[2/2] media: i2c: imx519: Support for the Sony IMX519 sensor

From: Lee Jackson <lee.jackson@arducam.com>

Adds a driver for the 16MPix IMX519 CSI2 sensor.
Whilst the sensor supports 2 or 4 CSI2 data lanes, this driver
currently only supports 2 lanes. The driver also supports
Phase Detection Auto Focus (PDAF).

The following Bayer modes are currently available:

4656x3496 10-bit @ 10fps
3840x2160 10-bit (cropped) @ 21fps
2328x1748 10-bit (binned) @ 30fps
1920x1080 10-bit (cropped/binned) @ 60fps
1280x720 10-bit (cropped/binned) @ 120fps

The imx519 driver to adverise support for embedded data streams.
The imx519 sensor subdevice overloads the media pad to differentiate
between image stream (pad 0) and embedded data stream (pad 1) when
performing the v4l2_subdev_pad_ops functions.

Signed-off-by: Umang Jain <umang.jain@ideasonboard.com>
Tested-by: Umang Jain <umang.jain@ideasonboard.com>
---
 MAINTAINERS                |    8 +
 drivers/media/i2c/Kconfig  |   11 +
 drivers/media/i2c/Makefile |    1 +
 drivers/media/i2c/imx519.c | 2134 ++++++++++++++++++++++++++++++++++++
 4 files changed, 2154 insertions(+)
 create mode 100644 drivers/media/i2c/imx519.c

Hi Umang,

kernel test robot noticed the following build errors:

[auto build test ERROR on media-tree/master]
[also build test ERROR on soc/for-next linus/master v6.5-rc3 next-20230727]
[cannot apply to sailus-media-tree/streams]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Umang-Jain/media-dt-bindings-imx519-Add-IMX519-DT-bindings/20230727-234440
base:   git://linuxtv.org/media_tree.git master
patch link:    https://lore.kernel.org/r/20230727154108.308320-3-umang.jain%40ideasonboard.com
patch subject: [PATCH 2/2] media: i2c: imx519: Support for the Sony IMX519 sensor
config: x86_64-allyesconfig (https://download.01.org/0day-ci/archive/20230728/202307281538.bqZ5kcV9-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce: (https://download.01.org/0day-ci/archive/20230728/202307281538.bqZ5kcV9-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202307281538.bqZ5kcV9-lkp@intel.com/

All errors (new ones prefixed by >>):

   drivers/media/i2c/imx519.c: In function 'imx519_open':
>> drivers/media/i2c/imx519.c:1170:30: error: 'MEDIA_BUS_FMT_SENSOR_DATA' undeclared (first use in this function)
    1170 |         try_fmt_meta->code = MEDIA_BUS_FMT_SENSOR_DATA;
         |                              ^~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/media/i2c/imx519.c:1170:30: note: each undeclared identifier is reported only once for each function it appears in
   drivers/media/i2c/imx519.c: In function 'imx519_enum_mbus_code':
   drivers/media/i2c/imx519.c:1319:30: error: 'MEDIA_BUS_FMT_SENSOR_DATA' undeclared (first use in this function)
    1319 |                 code->code = MEDIA_BUS_FMT_SENSOR_DATA;
         |                              ^~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/media/i2c/imx519.c: In function 'imx519_enum_frame_size':
   drivers/media/i2c/imx519.c:1346:34: error: 'MEDIA_BUS_FMT_SENSOR_DATA' undeclared (first use in this function)
    1346 |                 if (fse->code != MEDIA_BUS_FMT_SENSOR_DATA || fse->index > 0)
         |                                  ^~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/media/i2c/imx519.c: In function 'imx519_update_metadata_pad_format':
   drivers/media/i2c/imx519.c:1382:28: error: 'MEDIA_BUS_FMT_SENSOR_DATA' undeclared (first use in this function)
    1382 |         fmt->format.code = MEDIA_BUS_FMT_SENSOR_DATA;
         |                            ^~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/media/i2c/imx519.c: In function 'imx519_get_pad_format':
   drivers/media/i2c/imx519.c:1404:33: error: 'MEDIA_BUS_FMT_SENSOR_DATA' undeclared (first use in this function)
    1404 |                                 MEDIA_BUS_FMT_SENSOR_DATA;
         |                                 ^~~~~~~~~~~~~~~~~~~~~~~~~


vim +/MEDIA_BUS_FMT_SENSOR_DATA +1170 drivers/media/i2c/imx519.c

  1149	
  1150	static int imx519_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
  1151	{
  1152		struct imx519 *imx519 = to_imx519(sd);
  1153		struct v4l2_mbus_framefmt *try_fmt_img =
  1154			v4l2_subdev_get_try_format(sd, fh->state, IMAGE_PAD);
  1155		struct v4l2_mbus_framefmt *try_fmt_meta =
  1156			v4l2_subdev_get_try_format(sd, fh->state, METADATA_PAD);
  1157		struct v4l2_rect *try_crop;
  1158	
  1159		mutex_lock(&imx519->mutex);
  1160	
  1161		/* Initialize try_fmt for the image pad */
  1162		try_fmt_img->width = supported_modes_10bit[0].width;
  1163		try_fmt_img->height = supported_modes_10bit[0].height;
  1164		try_fmt_img->code = imx519_get_format_code(imx519);
  1165		try_fmt_img->field = V4L2_FIELD_NONE;
  1166	
  1167		/* Initialize try_fmt for the embedded metadata pad */
  1168		try_fmt_meta->width = IMX519_EMBEDDED_LINE_WIDTH;
  1169		try_fmt_meta->height = IMX519_NUM_EMBEDDED_LINES;
> 1170		try_fmt_meta->code = MEDIA_BUS_FMT_SENSOR_DATA;
  1171		try_fmt_meta->field = V4L2_FIELD_NONE;
  1172	
  1173		/* Initialize try_crop */
  1174		try_crop = v4l2_subdev_get_try_crop(sd, fh->state, IMAGE_PAD);
  1175		try_crop->left = IMX519_PIXEL_ARRAY_LEFT;
  1176		try_crop->top = IMX519_PIXEL_ARRAY_TOP;
  1177		try_crop->width = IMX519_PIXEL_ARRAY_WIDTH;
  1178		try_crop->height = IMX519_PIXEL_ARRAY_HEIGHT;
  1179	
  1180		mutex_unlock(&imx519->mutex);
  1181	
  1182		return 0;
  1183	}
  1184

On 7/28/23 12:56 PM, kernel test robot wrote:
> Hi Umang,
>
> kernel test robot noticed the following build errors:
>
> [auto build test ERROR on media-tree/master]
> [also build test ERROR on soc/for-next linus/master v6.5-rc3 next-20230727]
> [cannot apply to sailus-media-tree/streams]
> [If your patch is applied to the wrong git tree, kindly drop us a note.
> And when submitting patch, we suggest to use '--base' as documented in
> https://git-scm.com/docs/git-format-patch#_base_tree_information]
>
> url:    https://github.com/intel-lab-lkp/linux/commits/Umang-Jain/media-dt-bindings-imx519-Add-IMX519-DT-bindings/20230727-234440
> base:   git://linuxtv.org/media_tree.git master
> patch link:    https://lore.kernel.org/r/20230727154108.308320-3-umang.jain%40ideasonboard.com
> patch subject: [PATCH 2/2] media: i2c: imx519: Support for the Sony IMX519 sensor
> config: x86_64-allyesconfig (https://download.01.org/0day-ci/archive/20230728/202307281538.bqZ5kcV9-lkp@intel.com/config)
> compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
> reproduce: (https://download.01.org/0day-ci/archive/20230728/202307281538.bqZ5kcV9-lkp@intel.com/reproduce)
>
> If you fix the issue in a separate patch/commit (i.e. not just a new version of
> the same patch/commit), kindly add following tags
> | Reported-by: kernel test robot <lkp@intel.com>
> | Closes: https://lore.kernel.org/oe-kbuild-all/202307281538.bqZ5kcV9-lkp@intel.com/
>
> All errors (new ones prefixed by >>):
>
>     drivers/media/i2c/imx519.c: In function 'imx519_open':
>>> drivers/media/i2c/imx519.c:1170:30: error: 'MEDIA_BUS_FMT_SENSOR_DATA' undeclared (first use in this function)

This comes from the bcm2835-unicam for Rpi's that's being worked upon. 
And I was testing this driver on top of it.
>      1170 |         try_fmt_meta->code = MEDIA_BUS_FMT_SENSOR_DATA;
>           |                              ^~~~~~~~~~~~~~~~~~~~~~~~~
>     drivers/media/i2c/imx519.c:1170:30: note: each undeclared identifier is reported only once for each function it appears in
>     drivers/media/i2c/imx519.c: In function 'imx519_enum_mbus_code':
>     drivers/media/i2c/imx519.c:1319:30: error: 'MEDIA_BUS_FMT_SENSOR_DATA' undeclared (first use in this function)
>      1319 |                 code->code = MEDIA_BUS_FMT_SENSOR_DATA;
>           |                              ^~~~~~~~~~~~~~~~~~~~~~~~~
>     drivers/media/i2c/imx519.c: In function 'imx519_enum_frame_size':
>     drivers/media/i2c/imx519.c:1346:34: error: 'MEDIA_BUS_FMT_SENSOR_DATA' undeclared (first use in this function)
>      1346 |                 if (fse->code != MEDIA_BUS_FMT_SENSOR_DATA || fse->index > 0)
>           |                                  ^~~~~~~~~~~~~~~~~~~~~~~~~
>     drivers/media/i2c/imx519.c: In function 'imx519_update_metadata_pad_format':
>     drivers/media/i2c/imx519.c:1382:28: error: 'MEDIA_BUS_FMT_SENSOR_DATA' undeclared (first use in this function)
>      1382 |         fmt->format.code = MEDIA_BUS_FMT_SENSOR_DATA;
>           |                            ^~~~~~~~~~~~~~~~~~~~~~~~~
>     drivers/media/i2c/imx519.c: In function 'imx519_get_pad_format':
>     drivers/media/i2c/imx519.c:1404:33: error: 'MEDIA_BUS_FMT_SENSOR_DATA' undeclared (first use in this function)
>      1404 |                                 MEDIA_BUS_FMT_SENSOR_DATA;
>           |                                 ^~~~~~~~~~~~~~~~~~~~~~~~~
>
>
> vim +/MEDIA_BUS_FMT_SENSOR_DATA +1170 drivers/media/i2c/imx519.c
>
>    1149	
>    1150	static int imx519_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
>    1151	{
>    1152		struct imx519 *imx519 = to_imx519(sd);
>    1153		struct v4l2_mbus_framefmt *try_fmt_img =
>    1154			v4l2_subdev_get_try_format(sd, fh->state, IMAGE_PAD);
>    1155		struct v4l2_mbus_framefmt *try_fmt_meta =
>    1156			v4l2_subdev_get_try_format(sd, fh->state, METADATA_PAD);
>    1157		struct v4l2_rect *try_crop;
>    1158	
>    1159		mutex_lock(&imx519->mutex);
>    1160	
>    1161		/* Initialize try_fmt for the image pad */
>    1162		try_fmt_img->width = supported_modes_10bit[0].width;
>    1163		try_fmt_img->height = supported_modes_10bit[0].height;
>    1164		try_fmt_img->code = imx519_get_format_code(imx519);
>    1165		try_fmt_img->field = V4L2_FIELD_NONE;
>    1166	
>    1167		/* Initialize try_fmt for the embedded metadata pad */
>    1168		try_fmt_meta->width = IMX519_EMBEDDED_LINE_WIDTH;
>    1169		try_fmt_meta->height = IMX519_NUM_EMBEDDED_LINES;
>> 1170		try_fmt_meta->code = MEDIA_BUS_FMT_SENSOR_DATA;
>    1171		try_fmt_meta->field = V4L2_FIELD_NONE;
>    1172	
>    1173		/* Initialize try_crop */
>    1174		try_crop = v4l2_subdev_get_try_crop(sd, fh->state, IMAGE_PAD);
>    1175		try_crop->left = IMX519_PIXEL_ARRAY_LEFT;
>    1176		try_crop->top = IMX519_PIXEL_ARRAY_TOP;
>    1177		try_crop->width = IMX519_PIXEL_ARRAY_WIDTH;
>    1178		try_crop->height = IMX519_PIXEL_ARRAY_HEIGHT;
>    1179	
>    1180		mutex_unlock(&imx519->mutex);
>    1181	
>    1182		return 0;
>    1183	}
>    1184	
>

On 27/07/2023 17:41, Umang Jain wrote:
> From: Lee Jackson <lee.jackson@arducam.com>
> 
> Adds a driver for the 16MPix IMX519 CSI2 sensor.
> Whilst the sensor supports 2 or 4 CSI2 data lanes, this driver
> currently only supports 2 lanes. The driver also supports
> Phase Detection Auto Focus (PDAF).


Thank you for your patch. There is something to discuss/improve.


> +
> +error_out:
> +	v4l2_fwnode_endpoint_free(&ep_cfg);
> +	fwnode_handle_put(endpoint);
> +
> +	return ret;
> +}
> +
> +static const struct of_device_id imx519_dt_ids[] = {
> +	{ .compatible = "sony,imx519"},
> +	{ /* sentinel */ }
> +};
> +
> +static int imx519_probe(struct i2c_client *client)
> +{
> +	struct device *dev = &client->dev;
> +	struct imx519 *imx519;
> +	const struct of_device_id *match;
> +	u32 xclk_freq;
> +	int ret;
> +
> +	imx519 = devm_kzalloc(&client->dev, sizeof(*imx519), GFP_KERNEL);
> +	if (!imx519)
> +		return -ENOMEM;
> +
> +	v4l2_i2c_subdev_init(&imx519->sd, client, &imx519_subdev_ops);
> +
> +	match = of_match_device(imx519_dt_ids, dev);
> +	if (!match)
> +		return -ENODEV;
> +
> +	/* Check the hardware configuration in device tree */
> +	if (imx519_check_hwcfg(dev))
> +		return -EINVAL;
> +
> +	/* Get system clock (xclk) */
> +	imx519->xclk = devm_clk_get(dev, NULL);
> +	if (IS_ERR(imx519->xclk)) {
> +		dev_err(dev, "failed to get xclk\n");

return dev_err_probe

> +		return PTR_ERR(imx519->xclk);
> +	}
> +
> +	xclk_freq = clk_get_rate(imx519->xclk);
> +	if (xclk_freq != IMX519_XCLK_FREQ) {
> +		dev_err(dev, "xclk frequency not supported: %d Hz\n",
> +			xclk_freq);

return dev_err_probe

> +		return -EINVAL;
> +	}
> +
> +	ret = imx519_get_regulators(imx519);
> +	if (ret) {
> +		dev_err(dev, "failed to get regulators\n");
> +		return ret;

return dev_err_probe

> +	}
> +
> +	/* Request optional enable pin */
> +	imx519->reset_gpio = devm_gpiod_get_optional(dev, "reset",
> +						     GPIOD_OUT_HIGH);
> +
> +	/*
> +	 * The sensor must be powered for imx519_identify_module()
> +	 * to be able to read the CHIP_ID register
> +	 */
> +	ret = imx519_power_on(dev);
> +	if (ret)
> +		return ret;
> +
> +	ret = imx519_identify_module(imx519, IMX519_CHIP_ID);
> +	if (ret)
> +		goto error_power_off;
> +
> +	/* Set default mode to max resolution */
> +	imx519->mode = &supported_modes_10bit[0];
> +	imx519->fmt_code = MEDIA_BUS_FMT_SRGGB10_1X10;
> +
> +	/* Enable runtime PM and turn off the device */
> +	pm_runtime_set_active(dev);
> +	pm_runtime_enable(dev);
> +	pm_runtime_idle(dev);
> +
> +	/* This needs the pm runtime to be registered. */
> +	ret = imx519_init_controls(imx519);
> +	if (ret)
> +		goto error_power_off;
> +
> +	/* Initialize subdev */
> +	imx519->sd.internal_ops = &imx519_internal_ops;
> +	imx519->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE |
> +			    V4L2_SUBDEV_FL_HAS_EVENTS;
> +	imx519->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
> +
> +	/* Initialize source pads */
> +	imx519->pad[IMAGE_PAD].flags = MEDIA_PAD_FL_SOURCE;
> +	imx519->pad[METADATA_PAD].flags = MEDIA_PAD_FL_SOURCE;
> +
> +	ret = media_entity_pads_init(&imx519->sd.entity, NUM_PADS, imx519->pad);
> +	if (ret) {
> +		dev_err(dev, "failed to init entity pads: %d\n", ret);
> +		goto error_handler_free;
> +	}
> +
> +	ret = v4l2_async_register_subdev_sensor(&imx519->sd);
> +	if (ret < 0) {
> +		dev_err(dev, "failed to register sensor sub-device: %d\n", ret);
> +		goto error_media_entity;
> +	}
> +
> +	return 0;
> +
> +error_media_entity:
> +	media_entity_cleanup(&imx519->sd.entity);
> +
> +error_handler_free:
> +	imx519_free_controls(imx519);
> +
> +error_power_off:
> +	pm_runtime_disable(&client->dev);
> +	pm_runtime_set_suspended(&client->dev);
> +	imx519_power_off(&client->dev);
> +
> +	return ret;
> +}
> +
> +static void imx519_remove(struct i2c_client *client)
> +{
> +	struct v4l2_subdev *sd = i2c_get_clientdata(client);
> +	struct imx519 *imx519 = to_imx519(sd);
> +
> +	v4l2_async_unregister_subdev(sd);
> +	media_entity_cleanup(&sd->entity);
> +	imx519_free_controls(imx519);
> +
> +	pm_runtime_disable(&client->dev);
> +	if (!pm_runtime_status_suspended(&client->dev))
> +		imx519_power_off(&client->dev);
> +	pm_runtime_set_suspended(&client->dev);
> +}
> +
> +MODULE_DEVICE_TABLE(of, imx519_dt_ids);
> +
> +static const struct dev_pm_ops imx519_pm_ops = {
> +	SET_SYSTEM_SLEEP_PM_OPS(imx519_suspend, imx519_resume)
> +	SET_RUNTIME_PM_OPS(imx519_power_off, imx519_power_on, NULL)
> +};
> +
> +static struct i2c_driver imx519_i2c_driver = {
> +	.driver = {
> +		.name = "imx519",
> +		.of_match_table	= imx519_dt_ids,
> +		.pm = &imx519_pm_ops,
> +	},
> +	.probe_new = imx519_probe,

Are you sure? Wasn't i2c already converted?


Best regards,
Krzysztof

Hi Umang,

Thank you for the patchset. Please see my comments below.

On Thu, Jul 27, 2023 at 09:11:08PM +0530, Umang Jain wrote:
> From: Lee Jackson <lee.jackson@arducam.com>
> 
> Adds a driver for the 16MPix IMX519 CSI2 sensor.
> Whilst the sensor supports 2 or 4 CSI2 data lanes, this driver
> currently only supports 2 lanes. The driver also supports
> Phase Detection Auto Focus (PDAF).
> 
> The following Bayer modes are currently available:
> 
> 4656x3496 10-bit @ 10fps
> 3840x2160 10-bit (cropped) @ 21fps
> 2328x1748 10-bit (binned) @ 30fps
> 1920x1080 10-bit (cropped/binned) @ 60fps
> 1280x720 10-bit (cropped/binned) @ 120fps
> 
> The imx519 driver to adverise support for embedded data streams.
> The imx519 sensor subdevice overloads the media pad to differentiate
> between image stream (pad 0) and embedded data stream (pad 1) when
> performing the v4l2_subdev_pad_ops functions.
> 
> Signed-off-by: Umang Jain <umang.jain@ideasonboard.com>
> Tested-by: Umang Jain <umang.jain@ideasonboard.com>
> ---
>  MAINTAINERS                |    8 +
>  drivers/media/i2c/Kconfig  |   11 +
>  drivers/media/i2c/Makefile |    1 +
>  drivers/media/i2c/imx519.c | 2134 ++++++++++++++++++++++++++++++++++++
>  4 files changed, 2154 insertions(+)
>  create mode 100644 drivers/media/i2c/imx519.c
> 
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 63c7ce10a4ba..e5a33733f928 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -19747,6 +19747,14 @@ T:	git git://linuxtv.org/media_tree.git
>  F:	Documentation/devicetree/bindings/media/i2c/sony,imx415.yaml
>  F:	drivers/media/i2c/imx415.c
>  
> +SONY IMX519 SENSOR DRIVER
> +M:	Lee Jackson <lee.jackson@arducam.com>
> +L:	linux-media@vger.kernel.org
> +S:	Maintained
> +T:	git git://linuxtv.org/media_tree.git
> +F:	Documentation/devicetree/bindings/media/i2c/sony,imx519.yaml
> +F:	drivers/media/i2c/imx519.c
> +
>  SONY MEMORYSTICK SUBSYSTEM
>  M:	Maxim Levitsky <maximlevitsky@gmail.com>
>  M:	Alex Dubov <oakad@yahoo.com>
> diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig
> index 256d55bb2b1d..ebc2c7c42c53 100644
> --- a/drivers/media/i2c/Kconfig
> +++ b/drivers/media/i2c/Kconfig
> @@ -255,6 +255,17 @@ config VIDEO_IMX415
>  	  To compile this driver as a module, choose M here: the
>  	  module will be called imx415.
>  
> +config VIDEO_IMX519
> +	tristate "Arducam IMX519 sensor support"
> +	depends on I2C && VIDEO_DEV
> +	select VIDEO_V4L2_SUBDEV_API
> +	help
> +	  This is a Video4Linux2 sensor driver for the Arducam
> +	  IMX519 camera.
> +
> +	  To compile this driver as a module, choose M here: the
> +	  module will be called IMX519.
> +
>  config VIDEO_MAX9271_LIB
>  	tristate
>  
> diff --git a/drivers/media/i2c/Makefile b/drivers/media/i2c/Makefile
> index b44dacf935f4..872b98e5443f 100644
> --- a/drivers/media/i2c/Makefile
> +++ b/drivers/media/i2c/Makefile
> @@ -49,6 +49,7 @@ obj-$(CONFIG_VIDEO_IMX335) += imx335.o
>  obj-$(CONFIG_VIDEO_IMX355) += imx355.o
>  obj-$(CONFIG_VIDEO_IMX412) += imx412.o
>  obj-$(CONFIG_VIDEO_IMX415) += imx415.o
> +obj-$(CONFIG_VIDEO_IMX519) += imx519.o
>  obj-$(CONFIG_VIDEO_IR_I2C) += ir-kbd-i2c.o
>  obj-$(CONFIG_VIDEO_ISL7998X) += isl7998x.o
>  obj-$(CONFIG_VIDEO_KS0127) += ks0127.o
> diff --git a/drivers/media/i2c/imx519.c b/drivers/media/i2c/imx519.c
> new file mode 100644
> index 000000000000..54420b7738f1
> --- /dev/null
> +++ b/drivers/media/i2c/imx519.c
> @@ -0,0 +1,2134 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * A V4L2 driver for Sony IMX519 cameras.
> + * Copyright (C) 2023 Arducam Technology co., Ltd.
> + *
> + */
> +#include <asm/unaligned.h>
> +#include <linux/clk.h>
> +#include <linux/delay.h>
> +#include <linux/gpio/consumer.h>
> +#include <linux/i2c.h>
> +#include <linux/module.h>
> +#include <linux/of_device.h>
> +#include <linux/pm_runtime.h>
> +#include <linux/regulator/consumer.h>
> +#include <media/v4l2-ctrls.h>
> +#include <media/v4l2-device.h>
> +#include <media/v4l2-event.h>
> +#include <media/v4l2-fwnode.h>
> +#include <media/v4l2-mediabus.h>
> +
> +#define IMX519_REG_VALUE_08BIT		1
> +#define IMX519_REG_VALUE_16BIT		2
> +
> +/* Chip ID */
> +#define IMX519_REG_CHIP_ID		0x0016
> +#define IMX519_CHIP_ID			0x0519
> +
> +#define IMX519_REG_MODE_SELECT		0x0100
> +#define IMX519_MODE_STANDBY		0x00
> +#define IMX519_MODE_STREAMING		0x01
> +
> +#define IMX519_REG_ORIENTATION		0x101
> +
> +#define IMX519_XCLK_FREQ		24000000
> +
> +#define IMX519_DEFAULT_LINK_FREQ	408000000
> +
> +/* Pixel rate is fixed at 426MHz for all the modes */
> +#define IMX519_PIXEL_RATE		426666667
> +
> +/* V_TIMING internal */
> +#define IMX519_REG_FRAME_LENGTH		0x0340
> +#define IMX519_FRAME_LENGTH_MAX		0xffdc
> +
> +/* Long exposure multiplier */
> +#define IMX519_LONG_EXP_SHIFT_MAX	7
> +#define IMX519_LONG_EXP_SHIFT_REG	0x3100
> +
> +/* Exposure control */
> +#define IMX519_REG_EXPOSURE		0x0202
> +#define IMX519_EXPOSURE_OFFSET		32
> +#define IMX519_EXPOSURE_MIN		20
> +#define IMX519_EXPOSURE_STEP		1
> +#define IMX519_EXPOSURE_DEFAULT		0x3e8
> +#define IMX519_EXPOSURE_MAX		(IMX519_FRAME_LENGTH_MAX - \
> +					 IMX519_EXPOSURE_OFFSET)
> +
> +/* Analog gain control */
> +#define IMX519_REG_ANALOG_GAIN		0x0204
> +#define IMX519_ANA_GAIN_MIN		0
> +#define IMX519_ANA_GAIN_MAX		960
> +#define IMX519_ANA_GAIN_STEP		1
> +#define IMX519_ANA_GAIN_DEFAULT		0x0
> +
> +/* Digital gain control */
> +#define IMX519_REG_DIGITAL_GAIN		0x020e
> +#define IMX519_DGTL_GAIN_MIN		0x0100
> +#define IMX519_DGTL_GAIN_MAX		0xffff
> +#define IMX519_DGTL_GAIN_DEFAULT	0x0100
> +#define IMX519_DGTL_GAIN_STEP		1
> +
> +/* Test Pattern Control */
> +#define IMX519_REG_TEST_PATTERN		0x0600
> +#define IMX519_TEST_PATTERN_DISABLE	0
> +#define IMX519_TEST_PATTERN_SOLID_COLOR	1
> +#define IMX519_TEST_PATTERN_COLOR_BARS	2
> +#define IMX519_TEST_PATTERN_GREY_COLOR	3
> +#define IMX519_TEST_PATTERN_PN9		4
> +
> +/* Test pattern colour components */
> +#define IMX519_REG_TEST_PATTERN_R	0x0602
> +#define IMX519_REG_TEST_PATTERN_GR	0x0604
> +#define IMX519_REG_TEST_PATTERN_B	0x0606
> +#define IMX519_REG_TEST_PATTERN_GB	0x0608
> +#define IMX519_TEST_PATTERN_COLOUR_MIN	0
> +#define IMX519_TEST_PATTERN_COLOUR_MAX	0x0fff
> +#define IMX519_TEST_PATTERN_COLOUR_STEP	1
> +#define IMX519_TEST_PATTERN_R_DEFAULT	IMX519_TEST_PATTERN_COLOUR_MAX
> +#define IMX519_TEST_PATTERN_GR_DEFAULT	0
> +#define IMX519_TEST_PATTERN_B_DEFAULT	0
> +#define IMX519_TEST_PATTERN_GB_DEFAULT	0
> +
> +/* Embedded metadata stream structure */
> +#define IMX519_EMBEDDED_LINE_WIDTH	(5820 * 3)
> +#define IMX519_NUM_EMBEDDED_LINES	1
> +
> +/* IMX519 native and active pixel array size. */
> +#define IMX519_NATIVE_WIDTH		4672U
> +#define IMX519_NATIVE_HEIGHT		3648U
> +#define IMX519_PIXEL_ARRAY_LEFT		8U
> +#define IMX519_PIXEL_ARRAY_TOP		48U
> +#define IMX519_PIXEL_ARRAY_WIDTH	4656U
> +#define IMX519_PIXEL_ARRAY_HEIGHT	3496U
> +
> +enum pad_types {
> +	IMAGE_PAD,
> +	METADATA_PAD,

With streams, you only need one pad. (See that imx390 driver for an
example (below).)

> +	NUM_PADS
> +};
> +
> +struct imx519_reg {
> +	u16 address;
> +	u8 val;
> +};
> +
> +struct imx519_reg_list {
> +	unsigned int num_of_regs;
> +	const struct imx519_reg *regs;
> +};
> +
> +/* Mode : resolution and related config&values */
> +struct imx519_mode {
> +	/* Frame width */
> +	unsigned int width;
> +
> +	/* Frame height */
> +	unsigned int height;
> +
> +	/* H-timing in pixels */
> +	unsigned int line_length_pix;
> +
> +	/* Analog crop rectangle. */
> +	struct v4l2_rect crop;
> +
> +	/* Highest possible framerate. */
> +	struct v4l2_fract timeperframe_min;
> +
> +	/* Default framerate. */
> +	struct v4l2_fract timeperframe_default;
> +
> +	/* Default register values */
> +	struct imx519_reg_list reg_list;
> +};
> +
> +static const struct imx519_reg mode_common_regs[] = {
> +	{0x0100, 0x00},
> +	{0x0136, 0x18},
> +	{0x0137, 0x00},
> +	{0x3c7e, 0x01},
> +	{0x3c7f, 0x07},
> +	{0x3020, 0x00},
> +	{0x3e35, 0x01},
> +	{0x3f7f, 0x01},
> +	{0x5609, 0x57},
> +	{0x5613, 0x51},
> +	{0x561f, 0x5e},
> +	{0x5623, 0xd2},
> +	{0x5637, 0x11},
> +	{0x5657, 0x11},
> +	{0x5659, 0x12},
> +	{0x5733, 0x60},
> +	{0x5905, 0x57},
> +	{0x590f, 0x51},
> +	{0x591b, 0x5e},
> +	{0x591f, 0xd2},
> +	{0x5933, 0x11},
> +	{0x5953, 0x11},
> +	{0x5955, 0x12},
> +	{0x5a2f, 0x60},
> +	{0x5a85, 0x57},
> +	{0x5a8f, 0x51},
> +	{0x5a9b, 0x5e},
> +	{0x5a9f, 0xd2},
> +	{0x5ab3, 0x11},
> +	{0x5ad3, 0x11},
> +	{0x5ad5, 0x12},
> +	{0x5baf, 0x60},
> +	{0x5c15, 0x2a},
> +	{0x5c17, 0x80},
> +	{0x5c19, 0x31},
> +	{0x5c1b, 0x87},
> +	{0x5c25, 0x25},
> +	{0x5c27, 0x7b},
> +	{0x5c29, 0x2a},
> +	{0x5c2b, 0x80},
> +	{0x5c2d, 0x31},
> +	{0x5c2f, 0x87},
> +	{0x5c35, 0x2b},
> +	{0x5c37, 0x81},
> +	{0x5c39, 0x31},
> +	{0x5c3b, 0x87},
> +	{0x5c45, 0x25},
> +	{0x5c47, 0x7b},
> +	{0x5c49, 0x2a},
> +	{0x5c4b, 0x80},
> +	{0x5c4d, 0x31},
> +	{0x5c4f, 0x87},
> +	{0x5c55, 0x2d},
> +	{0x5c57, 0x83},
> +	{0x5c59, 0x32},
> +	{0x5c5b, 0x88},
> +	{0x5c65, 0x29},
> +	{0x5c67, 0x7f},
> +	{0x5c69, 0x2e},
> +	{0x5c6b, 0x84},
> +	{0x5c6d, 0x32},
> +	{0x5c6f, 0x88},
> +	{0x5e69, 0x04},
> +	{0x5e9d, 0x00},
> +	{0x5f18, 0x10},
> +	{0x5f1a, 0x0e},
> +	{0x5f20, 0x12},
> +	{0x5f22, 0x10},
> +	{0x5f24, 0x0e},
> +	{0x5f28, 0x10},
> +	{0x5f2a, 0x0e},
> +	{0x5f30, 0x12},
> +	{0x5f32, 0x10},
> +	{0x5f34, 0x0e},
> +	{0x5f38, 0x0f},
> +	{0x5f39, 0x0d},
> +	{0x5f3c, 0x11},
> +	{0x5f3d, 0x0f},
> +	{0x5f3e, 0x0d},
> +	{0x5f61, 0x07},
> +	{0x5f64, 0x05},
> +	{0x5f67, 0x03},
> +	{0x5f6a, 0x03},
> +	{0x5f6d, 0x07},
> +	{0x5f70, 0x07},
> +	{0x5f73, 0x05},
> +	{0x5f76, 0x02},
> +	{0x5f79, 0x07},
> +	{0x5f7c, 0x07},
> +	{0x5f7f, 0x07},
> +	{0x5f82, 0x07},
> +	{0x5f85, 0x03},
> +	{0x5f88, 0x02},
> +	{0x5f8b, 0x01},
> +	{0x5f8e, 0x01},
> +	{0x5f91, 0x04},
> +	{0x5f94, 0x05},
> +	{0x5f97, 0x02},
> +	{0x5f9d, 0x07},
> +	{0x5fa0, 0x07},
> +	{0x5fa3, 0x07},
> +	{0x5fa6, 0x07},
> +	{0x5fa9, 0x03},
> +	{0x5fac, 0x01},
> +	{0x5faf, 0x01},
> +	{0x5fb5, 0x03},
> +	{0x5fb8, 0x02},
> +	{0x5fbb, 0x01},
> +	{0x5fc1, 0x07},
> +	{0x5fc4, 0x07},
> +	{0x5fc7, 0x07},
> +	{0x5fd1, 0x00},
> +	{0x6302, 0x79},
> +	{0x6305, 0x78},
> +	{0x6306, 0xa5},
> +	{0x6308, 0x03},
> +	{0x6309, 0x20},
> +	{0x630b, 0x0a},
> +	{0x630d, 0x48},
> +	{0x630f, 0x06},
> +	{0x6311, 0xa4},
> +	{0x6313, 0x03},
> +	{0x6314, 0x20},
> +	{0x6316, 0x0a},
> +	{0x6317, 0x31},
> +	{0x6318, 0x4a},
> +	{0x631a, 0x06},
> +	{0x631b, 0x40},
> +	{0x631c, 0xa4},
> +	{0x631e, 0x03},
> +	{0x631f, 0x20},
> +	{0x6321, 0x0a},
> +	{0x6323, 0x4a},
> +	{0x6328, 0x80},
> +	{0x6329, 0x01},
> +	{0x632a, 0x30},
> +	{0x632b, 0x02},
> +	{0x632c, 0x20},
> +	{0x632d, 0x02},
> +	{0x632e, 0x30},
> +	{0x6330, 0x60},
> +	{0x6332, 0x90},
> +	{0x6333, 0x01},
> +	{0x6334, 0x30},
> +	{0x6335, 0x02},
> +	{0x6336, 0x20},
> +	{0x6338, 0x80},
> +	{0x633a, 0xa0},
> +	{0x633b, 0x01},
> +	{0x633c, 0x60},
> +	{0x633d, 0x02},
> +	{0x633e, 0x60},
> +	{0x633f, 0x01},
> +	{0x6340, 0x30},
> +	{0x6341, 0x02},
> +	{0x6342, 0x20},
> +	{0x6343, 0x03},
> +	{0x6344, 0x80},
> +	{0x6345, 0x03},
> +	{0x6346, 0x90},
> +	{0x6348, 0xf0},
> +	{0x6349, 0x01},
> +	{0x634a, 0x20},
> +	{0x634b, 0x02},
> +	{0x634c, 0x10},
> +	{0x634d, 0x03},
> +	{0x634e, 0x60},
> +	{0x6350, 0xa0},
> +	{0x6351, 0x01},
> +	{0x6352, 0x60},
> +	{0x6353, 0x02},
> +	{0x6354, 0x50},
> +	{0x6355, 0x02},
> +	{0x6356, 0x60},
> +	{0x6357, 0x01},
> +	{0x6358, 0x30},
> +	{0x6359, 0x02},
> +	{0x635a, 0x30},
> +	{0x635b, 0x03},
> +	{0x635c, 0x90},
> +	{0x635f, 0x01},
> +	{0x6360, 0x10},
> +	{0x6361, 0x01},
> +	{0x6362, 0x40},
> +	{0x6363, 0x02},
> +	{0x6364, 0x50},
> +	{0x6368, 0x70},
> +	{0x636a, 0xa0},
> +	{0x636b, 0x01},
> +	{0x636c, 0x50},
> +	{0x637d, 0xe4},
> +	{0x637e, 0xb4},
> +	{0x638c, 0x8e},
> +	{0x638d, 0x38},
> +	{0x638e, 0xe3},
> +	{0x638f, 0x4c},
> +	{0x6390, 0x30},
> +	{0x6391, 0xc3},
> +	{0x6392, 0xae},
> +	{0x6393, 0xba},
> +	{0x6394, 0xeb},
> +	{0x6395, 0x6e},
> +	{0x6396, 0x34},
> +	{0x6397, 0xe3},
> +	{0x6398, 0xcf},
> +	{0x6399, 0x3c},
> +	{0x639a, 0xf3},
> +	{0x639b, 0x0c},
> +	{0x639c, 0x30},
> +	{0x639d, 0xc1},
> +	{0x63b9, 0xa3},
> +	{0x63ba, 0xfe},
> +	{0x7600, 0x01},
> +	{0x79a0, 0x01},
> +	{0x79a1, 0x01},
> +	{0x79a2, 0x01},
> +	{0x79a3, 0x01},
> +	{0x79a4, 0x01},
> +	{0x79a5, 0x20},
> +	{0x79a9, 0x00},
> +	{0x79aa, 0x01},
> +	{0x79ad, 0x00},
> +	{0x79af, 0x00},
> +	{0x8173, 0x01},
> +	{0x835c, 0x01},
> +	{0x8a74, 0x01},
> +	{0x8c1f, 0x00},
> +	{0x8c27, 0x00},
> +	{0x8c3b, 0x03},
> +	{0x9004, 0x0b},
> +	{0x920c, 0x6a},
> +	{0x920d, 0x22},
> +	{0x920e, 0x6a},
> +	{0x920f, 0x23},
> +	{0x9214, 0x6a},
> +	{0x9215, 0x20},
> +	{0x9216, 0x6a},
> +	{0x9217, 0x21},
> +	{0x9385, 0x3e},
> +	{0x9387, 0x1b},
> +	{0x938d, 0x4d},
> +	{0x938f, 0x43},
> +	{0x9391, 0x1b},
> +	{0x9395, 0x4d},
> +	{0x9397, 0x43},
> +	{0x9399, 0x1b},
> +	{0x939d, 0x3e},
> +	{0x939f, 0x2f},
> +	{0x93a5, 0x43},
> +	{0x93a7, 0x2f},
> +	{0x93a9, 0x2f},
> +	{0x93ad, 0x34},
> +	{0x93af, 0x2f},
> +	{0x93b5, 0x3e},
> +	{0x93b7, 0x2f},
> +	{0x93bd, 0x4d},
> +	{0x93bf, 0x43},
> +	{0x93c1, 0x2f},
> +	{0x93c5, 0x4d},
> +	{0x93c7, 0x43},
> +	{0x93c9, 0x2f},
> +	{0x974b, 0x02},
> +	{0x995c, 0x8c},
> +	{0x995d, 0x00},
> +	{0x995e, 0x00},
> +	{0x9963, 0x64},
> +	{0x9964, 0x50},
> +	{0xaa0a, 0x26},
> +	{0xae03, 0x04},
> +	{0xae04, 0x03},
> +	{0xae05, 0x03},
> +	{0xbc1c, 0x08},
> +	{0xbcf1, 0x02},
> +	{0x38a3, 0x00},
> +};
> +
> +/* 16 mpix 10fps */
> +static const struct imx519_reg mode_4656x3496_regs[] = {
> +	{0x0111, 0x02},
> +	{0x0112, 0x0a},
> +	{0x0113, 0x0a},
> +	{0x0114, 0x01},
> +	{0x0342, 0x31},
> +	{0x0343, 0x6a},
> +	{0x0340, 0x0d},
> +	{0x0341, 0xf4},
> +	{0x0344, 0x00},
> +	{0x0345, 0x00},
> +	{0x0346, 0x00},
> +	{0x0347, 0x00},
> +	{0x0348, 0x12},
> +	{0x0349, 0x2f},
> +	{0x034a, 0x0d},
> +	{0x034b, 0xa7},
> +	{0x0220, 0x00},
> +	{0x0221, 0x11},
> +	{0x0222, 0x01},
> +	{0x0900, 0x00},
> +	{0x0901, 0x11},
> +	{0x0902, 0x0a},
> +	{0x3f4c, 0x01},
> +	{0x3f4d, 0x01},
> +	{0x4254, 0x7f},
> +	{0x0401, 0x00},
> +	{0x0404, 0x00},
> +	{0x0405, 0x10},
> +	{0x0408, 0x00},
> +	{0x0409, 0x00},
> +	{0x040a, 0x00},
> +	{0x040b, 0x00},
> +	{0x040c, 0x12},
> +	{0x040d, 0x30},
> +	{0x040e, 0x0d},
> +	{0x040f, 0xa8},
> +	{0x034c, 0x12},
> +	{0x034d, 0x30},
> +	{0x034e, 0x0d},
> +	{0x034f, 0xa8},
> +	{0x0301, 0x06},
> +	{0x0303, 0x04},
> +	{0x0305, 0x06},
> +	{0x0306, 0x01},
> +	{0x0307, 0x40},
> +	{0x0309, 0x0a},
> +	{0x030b, 0x02},
> +	{0x030d, 0x04},
> +	{0x030e, 0x01},
> +	{0x030f, 0x10},
> +	{0x0310, 0x01},
> +	{0x0820, 0x0a},
> +	{0x0821, 0x20},
> +	{0x0822, 0x00},
> +	{0x0823, 0x00},
> +	{0x3e20, 0x01},
> +	{0x3e37, 0x01},
> +	{0x3e3b, 0x00},
> +	{0x38a4, 0x00},
> +	{0x38a5, 0x00},
> +	{0x38a6, 0x00},
> +	{0x38a7, 0x00},
> +	{0x38a8, 0x01},
> +	{0x38a9, 0x23},
> +	{0x38aa, 0x01},
> +	{0x38ab, 0x23},
> +	{0x0106, 0x00},
> +	{0x0b00, 0x00},
> +	{0x3230, 0x00},
> +	{0x3f14, 0x01},
> +	{0x3f3c, 0x01},
> +	{0x3f0d, 0x0a},
> +	{0x3fbc, 0x00},
> +	{0x3c06, 0x00},
> +	{0x3c07, 0x48},
> +	{0x3c0a, 0x00},
> +	{0x3c0b, 0x00},
> +	{0x3f78, 0x00},
> +	{0x3f79, 0x40},
> +	{0x3f7c, 0x00},
> +	{0x3f7d, 0x00},
> +};
> +
> +/* 4k 21fps mode */
> +static const struct imx519_reg mode_3840x2160_regs[] = {
> +	{0x0111, 0x02},
> +	{0x0112, 0x0a},
> +	{0x0113, 0x0a},
> +	{0x0114, 0x01},
> +	{0x0342, 0x28},
> +	{0x0343, 0xf6},
> +	{0x0340, 0x08},
> +	{0x0341, 0xd4},
> +	{0x0344, 0x01},
> +	{0x0345, 0x98},
> +	{0x0346, 0x02},
> +	{0x0347, 0xa0},
> +	{0x0348, 0x10},
> +	{0x0349, 0x97},
> +	{0x034a, 0x0b},
> +	{0x034b, 0x17},
> +	{0x0220, 0x00},
> +	{0x0221, 0x11},
> +	{0x0222, 0x01},
> +	{0x0900, 0x00},
> +	{0x0901, 0x11},
> +	{0x0902, 0x0a},
> +	{0x3f4c, 0x01},
> +	{0x3f4d, 0x01},
> +	{0x4254, 0x7f},
> +	{0x0401, 0x00},
> +	{0x0404, 0x00},
> +	{0x0405, 0x10},
> +	{0x0408, 0x00},
> +	{0x0409, 0x00},
> +	{0x040a, 0x00},
> +	{0x040b, 0x00},
> +	{0x040c, 0x0f},
> +	{0x040d, 0x00},
> +	{0x040e, 0x08},
> +	{0x040f, 0x70},
> +	{0x034c, 0x0f},
> +	{0x034d, 0x00},
> +	{0x034e, 0x08},
> +	{0x034f, 0x70},
> +	{0x0301, 0x06},
> +	{0x0303, 0x04},
> +	{0x0305, 0x06},
> +	{0x0306, 0x01},
> +	{0x0307, 0x40},
> +	{0x0309, 0x0a},
> +	{0x030b, 0x02},
> +	{0x030d, 0x04},
> +	{0x030e, 0x01},
> +	{0x030f, 0x10},
> +	{0x0310, 0x01},
> +	{0x0820, 0x0a},
> +	{0x0821, 0x20},
> +	{0x0822, 0x00},
> +	{0x0823, 0x00},
> +	{0x3e20, 0x01},
> +	{0x3e37, 0x01},
> +	{0x3e3b, 0x00},
> +	{0x38a4, 0x00},
> +	{0x38a5, 0x00},
> +	{0x38a6, 0x00},
> +	{0x38a7, 0x00},
> +	{0x38a8, 0x00},
> +	{0x38a9, 0xf0},
> +	{0x38aa, 0x00},
> +	{0x38ab, 0xb4},
> +	{0x0106, 0x00},
> +	{0x0b00, 0x00},
> +	{0x3230, 0x00},
> +	{0x3f14, 0x01},
> +	{0x3f3c, 0x01},
> +	{0x3f0d, 0x0a},
> +	{0x3fbc, 0x00},
> +	{0x3c06, 0x00},
> +	{0x3c07, 0x48},
> +	{0x3c0a, 0x00},
> +	{0x3c0b, 0x00},
> +	{0x3f78, 0x00},
> +	{0x3f79, 0x40},
> +	{0x3f7c, 0x00},
> +	{0x3f7d, 0x00},
> +};
> +
> +/* 2x2 binned 30fps mode */
> +static const struct imx519_reg mode_2328x1748_regs[] = {
> +	{0x0111, 0x02},
> +	{0x0112, 0x0a},
> +	{0x0113, 0x0a},
> +	{0x0114, 0x01},
> +	{0x0342, 0x19},
> +	{0x0343, 0x70},
> +	{0x0340, 0x08},
> +	{0x0341, 0x88},
> +	{0x0344, 0x00},
> +	{0x0345, 0x00},
> +	{0x0346, 0x00},
> +	{0x0347, 0x00},
> +	{0x0348, 0x12},
> +	{0x0349, 0x2f},
> +	{0x034a, 0x0d},
> +	{0x034b, 0xa7},
> +	{0x0220, 0x00},
> +	{0x0221, 0x11},
> +	{0x0222, 0x01},
> +	{0x0900, 0x01},
> +	{0x0901, 0x22},
> +	{0x0902, 0x0a},
> +	{0x3f4c, 0x05},
> +	{0x3f4d, 0x03},
> +	{0x4254, 0x7f},
> +	{0x0401, 0x00},
> +	{0x0404, 0x00},
> +	{0x0405, 0x10},
> +	{0x0408, 0x00},
> +	{0x0409, 0x00},
> +	{0x040a, 0x00},
> +	{0x040b, 0x00},
> +	{0x040c, 0x09},
> +	{0x040d, 0x18},
> +	{0x040e, 0x06},
> +	{0x040f, 0xd4},
> +	{0x034c, 0x09},
> +	{0x034d, 0x18},
> +	{0x034e, 0x06},
> +	{0x034f, 0xd4},
> +	{0x0301, 0x06},
> +	{0x0303, 0x04},
> +	{0x0305, 0x06},
> +	{0x0306, 0x01},
> +	{0x0307, 0x40},
> +	{0x0309, 0x0a},
> +	{0x030b, 0x02},
> +	{0x030d, 0x04},
> +	{0x030e, 0x01},
> +	{0x030f, 0x10},
> +	{0x0310, 0x01},
> +	{0x0820, 0x0a},
> +	{0x0821, 0x20},
> +	{0x0822, 0x00},
> +	{0x0823, 0x00},
> +	{0x3e20, 0x01},
> +	{0x3e37, 0x01},
> +	{0x3e3b, 0x00},
> +	{0x38a4, 0x00},
> +	{0x38a5, 0x00},
> +	{0x38a6, 0x00},
> +	{0x38a7, 0x00},
> +	{0x38a8, 0x00},
> +	{0x38a9, 0x91},
> +	{0x38aa, 0x00},
> +	{0x38ab, 0x91},
> +	{0x0106, 0x00},
> +	{0x0b00, 0x00},
> +	{0x3230, 0x00},
> +	{0x3f14, 0x01},
> +	{0x3f3c, 0x01},
> +	{0x3f0d, 0x0a},
> +	{0x3fbc, 0x00},
> +	{0x3c06, 0x00},
> +	{0x3c07, 0x48},
> +	{0x3c0a, 0x00},
> +	{0x3c0b, 0x00},
> +	{0x3f78, 0x00},
> +	{0x3f79, 0x40},
> +	{0x3f7c, 0x00},
> +	{0x3f7d, 0x00},
> +};
> +
> +/* 1080p 60fps mode */
> +static const struct imx519_reg mode_1920x1080_regs[] = {
> +	{0x0111, 0x02},
> +	{0x0112, 0x0a},
> +	{0x0113, 0x0a},
> +	{0x0114, 0x01},
> +	{0x0342, 0x17},
> +	{0x0343, 0x8b},
> +	{0x0340, 0x04},
> +	{0x0341, 0x9c},
> +	{0x0344, 0x01},
> +	{0x0345, 0x98},
> +	{0x0346, 0x02},
> +	{0x0347, 0xa2},
> +	{0x0348, 0x10},
> +	{0x0349, 0x97},
> +	{0x034a, 0x0b},
> +	{0x034b, 0x15},
> +	{0x0220, 0x00},
> +	{0x0221, 0x11},
> +	{0x0222, 0x01},
> +	{0x0900, 0x01},
> +	{0x0901, 0x22},
> +	{0x0902, 0x0a},
> +	{0x3f4c, 0x05},
> +	{0x3f4d, 0x03},
> +	{0x4254, 0x7f},
> +	{0x0401, 0x00},
> +	{0x0404, 0x00},
> +	{0x0405, 0x10},
> +	{0x0408, 0x00},
> +	{0x0409, 0x00},
> +	{0x040a, 0x00},
> +	{0x040b, 0x00},
> +	{0x040c, 0x07},
> +	{0x040d, 0x80},
> +	{0x040e, 0x04},
> +	{0x040f, 0x38},
> +	{0x034c, 0x07},
> +	{0x034d, 0x80},
> +	{0x034e, 0x04},
> +	{0x034f, 0x38},
> +	{0x0301, 0x06},
> +	{0x0303, 0x04},
> +	{0x0305, 0x06},
> +	{0x0306, 0x01},
> +	{0x0307, 0x40},
> +	{0x0309, 0x0a},
> +	{0x030b, 0x02},
> +	{0x030d, 0x04},
> +	{0x030e, 0x01},
> +	{0x030f, 0x10},
> +	{0x0310, 0x01},
> +	{0x0820, 0x0a},
> +	{0x0821, 0x20},
> +	{0x0822, 0x00},
> +	{0x0823, 0x00},
> +	{0x3e20, 0x01},
> +	{0x3e37, 0x01},
> +	{0x3e3b, 0x00},
> +	{0x38a4, 0x00},
> +	{0x38a5, 0x00},
> +	{0x38a6, 0x00},
> +	{0x38a7, 0x00},
> +	{0x38a8, 0x00},
> +	{0x38a9, 0x78},
> +	{0x38aa, 0x00},
> +	{0x38ab, 0x5a},
> +	{0x0106, 0x00},
> +	{0x0b00, 0x00},
> +	{0x3230, 0x00},
> +	{0x3f14, 0x01},
> +	{0x3f3c, 0x01},
> +	{0x3f0d, 0x0a},
> +	{0x3fbc, 0x00},
> +	{0x3c06, 0x00},
> +	{0x3c07, 0x48},
> +	{0x3c0a, 0x00},
> +	{0x3c0b, 0x00},
> +	{0x3f78, 0x00},
> +	{0x3f79, 0x40},
> +	{0x3f7c, 0x00},
> +	{0x3f7d, 0x00},
> +};
> +
> +/* 720p 120fps mode */
> +static const struct imx519_reg mode_1280x720_regs[] = {
> +	{0x0111, 0x02},
> +	{0x0112, 0x0a},
> +	{0x0113, 0x0a},
> +	{0x0114, 0x01},
> +	{0x0342, 0x18},
> +	{0x0343, 0x00},
> +	{0x0340, 0x03},
> +	{0x0341, 0x34},
> +	{0x0344, 0x04},
> +	{0x0345, 0x18},
> +	{0x0346, 0x04},
> +	{0x0347, 0x12},
> +	{0x0348, 0x0e},
> +	{0x0349, 0x17},
> +	{0x034a, 0x09},
> +	{0x034b, 0xb6},
> +	{0x0220, 0x00},
> +	{0x0221, 0x11},
> +	{0x0222, 0x01},
> +	{0x0900, 0x01},
> +	{0x0901, 0x22},
> +	{0x0902, 0x0a},
> +	{0x3f4c, 0x05},
> +	{0x3f4d, 0x03},
> +	{0x4254, 0x7f},
> +	{0x0401, 0x00},
> +	{0x0404, 0x00},
> +	{0x0405, 0x10},
> +	{0x0408, 0x00},
> +	{0x0409, 0x00},
> +	{0x040a, 0x00},
> +	{0x040b, 0x00},
> +	{0x040c, 0x05},
> +	{0x040d, 0x00},
> +	{0x040e, 0x02},
> +	{0x040f, 0xd0},
> +	{0x034c, 0x05},
> +	{0x034d, 0x00},
> +	{0x034e, 0x02},
> +	{0x034f, 0xd0},
> +	{0x0301, 0x06},
> +	{0x0303, 0x04},
> +	{0x0305, 0x06},
> +	{0x0306, 0x01},
> +	{0x0307, 0x40},
> +	{0x0309, 0x0a},
> +	{0x030b, 0x02},
> +	{0x030d, 0x04},
> +	{0x030e, 0x01},
> +	{0x030f, 0x10},
> +	{0x0310, 0x01},
> +	{0x0820, 0x0a},
> +	{0x0821, 0x20},
> +	{0x0822, 0x00},
> +	{0x0823, 0x00},
> +	{0x3e20, 0x01},
> +	{0x3e37, 0x01},
> +	{0x3e3b, 0x00},
> +	{0x38a4, 0x00},
> +	{0x38a5, 0x00},
> +	{0x38a6, 0x00},
> +	{0x38a7, 0x00},
> +	{0x38a8, 0x00},
> +	{0x38a9, 0x50},
> +	{0x38aa, 0x00},
> +	{0x38ab, 0x3c},
> +	{0x0106, 0x00},
> +	{0x0b00, 0x00},
> +	{0x3230, 0x00},
> +	{0x3f14, 0x01},
> +	{0x3f3c, 0x01},
> +	{0x3f0d, 0x0a},
> +	{0x3fbc, 0x00},
> +	{0x3c06, 0x00},
> +	{0x3c07, 0x48},
> +	{0x3c0a, 0x00},
> +	{0x3c0b, 0x00},
> +	{0x3f78, 0x00},
> +	{0x3f79, 0x40},
> +	{0x3f7c, 0x00},
> +	{0x3f7d, 0x00},
> +};
> +
> +/* Mode configs */
> +static const struct imx519_mode supported_modes_10bit[] = {
> +	{
> +		.width = 4656,
> +		.height = 3496,
> +		.line_length_pix = 0x316a,
> +		.crop = {
> +			.left = IMX519_PIXEL_ARRAY_LEFT,
> +			.top = IMX519_PIXEL_ARRAY_TOP,
> +			.width = 4656,
> +			.height = 3496,
> +		},
> +		.timeperframe_min = {
> +			.numerator = 100,
> +			.denominator = 900
> +		},
> +		.timeperframe_default = {
> +			.numerator = 100,
> +			.denominator = 900
> +		},
> +		.reg_list = {
> +			.num_of_regs = ARRAY_SIZE(mode_4656x3496_regs),
> +			.regs = mode_4656x3496_regs,
> +		}
> +	},
> +	{
> +		.width = 3840,
> +		.height = 2160,
> +		.line_length_pix = 0x28f6,
> +		.crop = {
> +			.left = IMX519_PIXEL_ARRAY_LEFT + 408,
> +			.top = IMX519_PIXEL_ARRAY_TOP + 672,
> +			.width = 3840,
> +			.height = 2160,
> +		},
> +		.timeperframe_min = {
> +			.numerator = 100,
> +			.denominator = 1800
> +		},
> +		.timeperframe_default = {
> +			.numerator = 100,
> +			.denominator = 1800
> +		},
> +		.reg_list = {
> +			.num_of_regs = ARRAY_SIZE(mode_3840x2160_regs),
> +			.regs = mode_3840x2160_regs,
> +		}
> +	},
> +	{
> +		.width = 2328,
> +		.height = 1748,
> +		.line_length_pix = 0x1970,
> +		.crop = {
> +			.left = IMX519_PIXEL_ARRAY_LEFT,
> +			.top = IMX519_PIXEL_ARRAY_TOP,
> +			.width = 4656,
> +			.height = 3496,
> +		},
> +		.timeperframe_min = {
> +			.numerator = 100,
> +			.denominator = 3000
> +		},
> +		.timeperframe_default = {
> +			.numerator = 100,
> +			.denominator = 3000
> +		},
> +		.reg_list = {
> +			.num_of_regs = ARRAY_SIZE(mode_2328x1748_regs),
> +			.regs = mode_2328x1748_regs,
> +		}
> +	},
> +	{
> +		.width = 1920,
> +		.height = 1080,
> +		.line_length_pix = 0x178b,
> +		.crop = {
> +			.left = IMX519_PIXEL_ARRAY_LEFT + 408,
> +			.top = IMX519_PIXEL_ARRAY_TOP + 674,
> +			.width = 3840,
> +			.height = 2160,
> +		},
> +		.timeperframe_min = {
> +			.numerator = 100,
> +			.denominator = 6000
> +		},
> +		.timeperframe_default = {
> +			.numerator = 100,
> +			.denominator = 6000
> +		},
> +		.reg_list = {
> +			.num_of_regs = ARRAY_SIZE(mode_1920x1080_regs),
> +			.regs = mode_1920x1080_regs,
> +		}
> +	},
> +	{
> +		.width = 1280,
> +		.height = 720,
> +		.line_length_pix = 0x1800,
> +		.crop = {
> +			.left = IMX519_PIXEL_ARRAY_LEFT + 1048,
> +			.top = IMX519_PIXEL_ARRAY_TOP + 1042,
> +			.width = 2560,
> +			.height = 1440,
> +		},
> +		.timeperframe_min = {
> +			.numerator = 100,
> +			.denominator = 8000
> +		},
> +		.timeperframe_default = {
> +			.numerator = 100,
> +			.denominator = 8000
> +		},
> +		.reg_list = {
> +			.num_of_regs = ARRAY_SIZE(mode_1280x720_regs),
> +			.regs = mode_1280x720_regs,
> +		}
> +	}
> +};
> +
> +/*
> + * The supported formats.
> + * This table MUST contain 4 entries per format, to cover the various flip
> + * combinations in the order
> + * - no flip
> + * - h flip
> + * - v flip
> + * - h&v flips
> + */
> +static const u32 codes[] = {
> +	/* 10-bit modes. */
> +	MEDIA_BUS_FMT_SRGGB10_1X10,
> +	MEDIA_BUS_FMT_SGRBG10_1X10,
> +	MEDIA_BUS_FMT_SGBRG10_1X10,
> +	MEDIA_BUS_FMT_SBGGR10_1X10,
> +};
> +
> +static const char * const imx519_test_pattern_menu[] = {
> +	"Disabled",
> +	"Color Bars",
> +	"Solid Color",
> +	"Grey Color Bars",
> +	"PN9"
> +};
> +
> +static const int imx519_test_pattern_val[] = {
> +	IMX519_TEST_PATTERN_DISABLE,
> +	IMX519_TEST_PATTERN_COLOR_BARS,
> +	IMX519_TEST_PATTERN_SOLID_COLOR,
> +	IMX519_TEST_PATTERN_GREY_COLOR,
> +	IMX519_TEST_PATTERN_PN9,
> +};
> +
> +/* regulator supplies */
> +static const char * const imx519_supply_name[] = {
> +	/* Supplies can be enabled in any order */
> +	"VANA",  /* Analog (2.8V) supply */
> +	"VDIG",  /* Digital Core (1.05V) supply */
> +	"VDDL",  /* IF (1.8V) supply */
> +};
> +
> +#define IMX519_NUM_SUPPLIES ARRAY_SIZE(imx519_supply_name)

Please use ARRAY_SIZE() directly instead.

> +
> +/*
> + * Initialisation delay between XCLR low->high and the moment when the sensor
> + * can start capture (i.e. can leave software standby), given by T7 in the
> + * datasheet is 8ms.  This does include I2C setup time as well.
> + *
> + * Note, that delay between XCLR low->high and reading the CCI ID register (T6
> + * in the datasheet) is much smaller - 600us.
> + */
> +#define IMX519_XCLR_MIN_DELAY_US	8000
> +#define IMX519_XCLR_DELAY_RANGE_US	1000
> +
> +struct imx519 {
> +	struct v4l2_subdev sd;
> +	struct media_pad pad[NUM_PADS];
> +
> +	unsigned int fmt_code;
> +
> +	struct clk *xclk;
> +
> +	struct gpio_desc *reset_gpio;
> +	struct regulator_bulk_data supplies[IMX519_NUM_SUPPLIES];
> +
> +	struct v4l2_ctrl_handler ctrl_handler;
> +	/* V4L2 Controls */
> +	struct v4l2_ctrl *pixel_rate;
> +	struct v4l2_ctrl *exposure;
> +	struct v4l2_ctrl *vflip;
> +	struct v4l2_ctrl *hflip;
> +	struct v4l2_ctrl *vblank;
> +	struct v4l2_ctrl *hblank;
> +
> +	/* Current mode */
> +	const struct imx519_mode *mode;
> +
> +	/*
> +	 * Mutex for serialized access:
> +	 * Protect sensor module set pad format and start/stop streaming safely.
> +	 */
> +	struct mutex mutex;
> +
> +	/* Streaming on/off */
> +	bool streaming;
> +
> +	/* Rewrite common registers on stream on? */
> +	bool common_regs_written;
> +
> +	/* Current long exposure factor in use. Set through V4L2_CID_VBLANK */
> +	unsigned int long_exp_shift;
> +};
> +
> +static inline struct imx519 *to_imx519(struct v4l2_subdev *_sd)

You could call the argument "sd" as well. Up to you.

> +{
> +	return container_of(_sd, struct imx519, sd);
> +}
> +
> +/* Read registers up to 2 at a time */
> +static int imx519_read_reg(struct imx519 *imx519, u16 reg, u32 len, u32 *val)
> +{
> +	struct i2c_client *client = v4l2_get_subdevdata(&imx519->sd);
> +	struct i2c_msg msgs[2];
> +	u8 addr_buf[2] = { reg >> 8, reg & 0xff };
> +	u8 data_buf[4] = { 0, };
> +	int ret;
> +
> +	if (len > 4)
> +		return -EINVAL;
> +
> +	/* Write register address */
> +	msgs[0].addr = client->addr;
> +	msgs[0].flags = 0;
> +	msgs[0].len = ARRAY_SIZE(addr_buf);
> +	msgs[0].buf = addr_buf;
> +
> +	/* Read data from register */
> +	msgs[1].addr = client->addr;
> +	msgs[1].flags = I2C_M_RD;
> +	msgs[1].len = len;
> +	msgs[1].buf = &data_buf[4 - len];
> +
> +	ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
> +	if (ret != ARRAY_SIZE(msgs))
> +		return -EIO;
> +
> +	*val = get_unaligned_be32(data_buf);
> +
> +	return 0;
> +}
> +
> +/* Write registers up to 2 at a time */
> +static int imx519_write_reg(struct imx519 *imx519, u16 reg, u32 len, u32 val)
> +{
> +	struct i2c_client *client = v4l2_get_subdevdata(&imx519->sd);
> +	u8 buf[6];
> +
> +	if (len > 4)
> +		return -EINVAL;
> +
> +	put_unaligned_be16(reg, buf);
> +	put_unaligned_be32(val << (8 * (4 - len)), buf + 2);
> +	if (i2c_master_send(client, buf, len + 2) != len + 2)
> +		return -EIO;
> +
> +	return 0;
> +}

We have V4L2 CCI helpers, please switch. (See
drivers/media/v4l2-core/v4l2-cci.c .)

> +
> +/* Write a list of registers */
> +static int imx519_write_regs(struct imx519 *imx519,
> +			     const struct imx519_reg *regs, u32 len)
> +{
> +	struct i2c_client *client = v4l2_get_subdevdata(&imx519->sd);
> +	unsigned int i;
> +	int ret;
> +
> +	for (i = 0; i < len; i++) {
> +		ret = imx519_write_reg(imx519, regs[i].address, 1, regs[i].val);
> +		if (ret) {
> +			dev_err_ratelimited(&client->dev,
> +					    "Failed to write reg 0x%4.4x. error = %d\n",
> +					    regs[i].address, ret);
> +
> +			return ret;
> +		}
> +	}
> +
> +	return 0;
> +}
> +
> +/* Get bayer order based on flip setting. */
> +static u32 imx519_get_format_code(struct imx519 *imx519)
> +{
> +	unsigned int i;
> +
> +	lockdep_assert_held(&imx519->mutex);
> +
> +	i = (imx519->vflip->val ? 2 : 0) |
> +	    (imx519->hflip->val ? 1 : 0);
> +
> +	return codes[i];
> +}
> +
> +static int imx519_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
> +{
> +	struct imx519 *imx519 = to_imx519(sd);
> +	struct v4l2_mbus_framefmt *try_fmt_img =
> +		v4l2_subdev_get_try_format(sd, fh->state, IMAGE_PAD);
> +	struct v4l2_mbus_framefmt *try_fmt_meta =
> +		v4l2_subdev_get_try_format(sd, fh->state, METADATA_PAD);
> +	struct v4l2_rect *try_crop;
> +
> +	mutex_lock(&imx519->mutex);
> +
> +	/* Initialize try_fmt for the image pad */
> +	try_fmt_img->width = supported_modes_10bit[0].width;
> +	try_fmt_img->height = supported_modes_10bit[0].height;
> +	try_fmt_img->code = imx519_get_format_code(imx519);
> +	try_fmt_img->field = V4L2_FIELD_NONE;
> +
> +	/* Initialize try_fmt for the embedded metadata pad */
> +	try_fmt_meta->width = IMX519_EMBEDDED_LINE_WIDTH;
> +	try_fmt_meta->height = IMX519_NUM_EMBEDDED_LINES;
> +	try_fmt_meta->code = MEDIA_BUS_FMT_SENSOR_DATA;
> +	try_fmt_meta->field = V4L2_FIELD_NONE;
> +
> +	/* Initialize try_crop */
> +	try_crop = v4l2_subdev_get_try_crop(sd, fh->state, IMAGE_PAD);
> +	try_crop->left = IMX519_PIXEL_ARRAY_LEFT;
> +	try_crop->top = IMX519_PIXEL_ARRAY_TOP;
> +	try_crop->width = IMX519_PIXEL_ARRAY_WIDTH;
> +	try_crop->height = IMX519_PIXEL_ARRAY_HEIGHT;
> +
> +	mutex_unlock(&imx519->mutex);

It'd be nicer to do this in the init_cfg callback.

In general, also switching to subdev state API would be nice. An example,
possibly somewhat unpolished, can be found here:
<URL:https://git.kernel.org/pub/scm/linux/kernel/git/tomba/linux.git/commit/?h=streams/work&id=d865071782564f1f118d7ad5d4b6813f47d908b5>.

> +
> +	return 0;
> +}
> +
> +static void imx519_adjust_exposure_range(struct imx519 *imx519)
> +{
> +	int exposure_max, exposure_def;
> +
> +	/* Honour the VBLANK limits when setting exposure. */
> +	exposure_max = imx519->mode->height + imx519->vblank->val -
> +		       IMX519_EXPOSURE_OFFSET;
> +	exposure_def = min(exposure_max, imx519->exposure->val);
> +	__v4l2_ctrl_modify_range(imx519->exposure, imx519->exposure->minimum,
> +				 exposure_max, imx519->exposure->step,
> +				 exposure_def);
> +}
> +
> +static int imx519_set_frame_length(struct imx519 *imx519, unsigned int val)
> +{
> +	int ret = 0;
> +
> +	imx519->long_exp_shift = 0;
> +
> +	while (val > IMX519_FRAME_LENGTH_MAX) {
> +		imx519->long_exp_shift++;
> +		val >>= 1;
> +	}
> +
> +	ret = imx519_write_reg(imx519, IMX519_REG_FRAME_LENGTH,
> +			       IMX519_REG_VALUE_16BIT, val);
> +	if (ret)
> +		return ret;
> +
> +	return imx519_write_reg(imx519, IMX519_LONG_EXP_SHIFT_REG,
> +				IMX519_REG_VALUE_08BIT, imx519->long_exp_shift);
> +}
> +
> +static int imx519_set_ctrl(struct v4l2_ctrl *ctrl)
> +{
> +	struct imx519 *imx519 =
> +		container_of(ctrl->handler, struct imx519, ctrl_handler);
> +	struct i2c_client *client = v4l2_get_subdevdata(&imx519->sd);
> +	int ret = 0;
> +
> +	/*
> +	 * The VBLANK control may change the limits of usable exposure, so check
> +	 * and adjust if necessary.
> +	 */
> +	if (ctrl->id == V4L2_CID_VBLANK)
> +		imx519_adjust_exposure_range(imx519);
> +
> +	/*
> +	 * Applying V4L2 control value only happens
> +	 * when power is up for streaming
> +	 */
> +	if (pm_runtime_get_if_in_use(&client->dev) == 0)
> +		return 0;
> +
> +	switch (ctrl->id) {
> +	case V4L2_CID_ANALOGUE_GAIN:
> +		ret = imx519_write_reg(imx519, IMX519_REG_ANALOG_GAIN,
> +				       IMX519_REG_VALUE_16BIT, ctrl->val);
> +		break;
> +	case V4L2_CID_EXPOSURE:
> +		ret = imx519_write_reg(imx519, IMX519_REG_EXPOSURE,
> +				       IMX519_REG_VALUE_16BIT, ctrl->val >>
> +							imx519->long_exp_shift);
> +		break;
> +	case V4L2_CID_DIGITAL_GAIN:
> +		ret = imx519_write_reg(imx519, IMX519_REG_DIGITAL_GAIN,
> +				       IMX519_REG_VALUE_16BIT, ctrl->val);
> +		break;
> +	case V4L2_CID_TEST_PATTERN:
> +		ret = imx519_write_reg(imx519, IMX519_REG_TEST_PATTERN,
> +				       IMX519_REG_VALUE_16BIT,
> +				       imx519_test_pattern_val[ctrl->val]);
> +		break;
> +	case V4L2_CID_TEST_PATTERN_RED:
> +		ret = imx519_write_reg(imx519, IMX519_REG_TEST_PATTERN_R,
> +				       IMX519_REG_VALUE_16BIT, ctrl->val);
> +		break;
> +	case V4L2_CID_TEST_PATTERN_GREENR:
> +		ret = imx519_write_reg(imx519, IMX519_REG_TEST_PATTERN_GR,
> +				       IMX519_REG_VALUE_16BIT, ctrl->val);
> +		break;
> +	case V4L2_CID_TEST_PATTERN_BLUE:
> +		ret = imx519_write_reg(imx519, IMX519_REG_TEST_PATTERN_B,
> +				       IMX519_REG_VALUE_16BIT, ctrl->val);
> +		break;
> +	case V4L2_CID_TEST_PATTERN_GREENB:
> +		ret = imx519_write_reg(imx519, IMX519_REG_TEST_PATTERN_GB,
> +				       IMX519_REG_VALUE_16BIT, ctrl->val);
> +		break;
> +	case V4L2_CID_HFLIP:
> +	case V4L2_CID_VFLIP:
> +		ret = imx519_write_reg(imx519, IMX519_REG_ORIENTATION, 1,
> +				       imx519->hflip->val |
> +				       imx519->vflip->val << 1);
> +		break;
> +	case V4L2_CID_VBLANK:
> +		ret = imx519_set_frame_length(imx519,
> +					      imx519->mode->height + ctrl->val);
> +		break;
> +	default:
> +		dev_info(&client->dev,
> +			 "ctrl(id:0x%x,val:0x%x) is not handled\n",
> +			 ctrl->id, ctrl->val);
> +		ret = -EINVAL;
> +		break;
> +	}
> +
> +	pm_runtime_put(&client->dev);
> +
> +	return ret;
> +}
> +
> +static const struct v4l2_ctrl_ops imx519_ctrl_ops = {
> +	.s_ctrl = imx519_set_ctrl,
> +};
> +
> +static int imx519_enum_mbus_code(struct v4l2_subdev *sd,
> +				 struct v4l2_subdev_state *sd_state,
> +				 struct v4l2_subdev_mbus_code_enum *code)
> +{
> +	struct imx519 *imx519 = to_imx519(sd);
> +
> +	if (code->pad >= NUM_PADS)
> +		return -EINVAL;

The caller will have checked for this already, same for other callbacks.

> +
> +	if (code->pad == IMAGE_PAD) {
> +		if (code->index > 0)
> +			return -EINVAL;
> +
> +		code->code = imx519_get_format_code(imx519);
> +	} else {
> +		if (code->index > 0)
> +			return -EINVAL;
> +
> +		code->code = MEDIA_BUS_FMT_SENSOR_DATA;
> +	}
> +
> +	return 0;
> +}
> +
> +static int imx519_enum_frame_size(struct v4l2_subdev *sd,
> +				  struct v4l2_subdev_state *sd_state,
> +				  struct v4l2_subdev_frame_size_enum *fse)
> +{
> +	struct imx519 *imx519 = to_imx519(sd);
> +
> +	if (fse->pad >= NUM_PADS)
> +		return -EINVAL;
> +
> +	if (fse->pad == IMAGE_PAD) {
> +		if (fse->index >= ARRAY_SIZE(supported_modes_10bit))
> +			return -EINVAL;
> +
> +		if (fse->code != imx519_get_format_code(imx519))
> +			return -EINVAL;
> +
> +		fse->min_width = supported_modes_10bit[fse->index].width;
> +		fse->max_width = fse->min_width;
> +		fse->min_height = supported_modes_10bit[fse->index].height;
> +		fse->max_height = fse->min_height;
> +	} else {
> +		if (fse->code != MEDIA_BUS_FMT_SENSOR_DATA || fse->index > 0)
> +			return -EINVAL;
> +
> +		fse->min_width = IMX519_EMBEDDED_LINE_WIDTH;
> +		fse->max_width = fse->min_width;
> +		fse->min_height = IMX519_NUM_EMBEDDED_LINES;
> +		fse->max_height = fse->min_height;
> +	}
> +
> +	return 0;
> +}
> +
> +static void imx519_reset_colorspace(struct v4l2_mbus_framefmt *fmt)
> +{
> +	fmt->colorspace = V4L2_COLORSPACE_RAW;
> +	fmt->ycbcr_enc = V4L2_MAP_YCBCR_ENC_DEFAULT(fmt->colorspace);
> +	fmt->quantization = V4L2_MAP_QUANTIZATION_DEFAULT(true,
> +							  fmt->colorspace,
> +							  fmt->ycbcr_enc);
> +	fmt->xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(fmt->colorspace);
> +}
> +
> +static void imx519_update_image_pad_format(struct imx519 *imx519,
> +					   const struct imx519_mode *mode,
> +					   struct v4l2_subdev_format *fmt)
> +{
> +	fmt->format.width = mode->width;
> +	fmt->format.height = mode->height;
> +	fmt->format.field = V4L2_FIELD_NONE;
> +	imx519_reset_colorspace(&fmt->format);
> +}
> +
> +static void imx519_update_metadata_pad_format(struct v4l2_subdev_format *fmt)
> +{
> +	fmt->format.width = IMX519_EMBEDDED_LINE_WIDTH;
> +	fmt->format.height = IMX519_NUM_EMBEDDED_LINES;
> +	fmt->format.code = MEDIA_BUS_FMT_SENSOR_DATA;
> +	fmt->format.field = V4L2_FIELD_NONE;
> +}
> +
> +static int imx519_get_pad_format(struct v4l2_subdev *sd,
> +				 struct v4l2_subdev_state *sd_state,
> +				 struct v4l2_subdev_format *fmt)
> +{
> +	struct imx519 *imx519 = to_imx519(sd);
> +
> +	if (fmt->pad >= NUM_PADS)
> +		return -EINVAL;
> +
> +	mutex_lock(&imx519->mutex);
> +
> +	if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
> +		struct v4l2_mbus_framefmt *try_fmt =
> +			v4l2_subdev_get_try_format(&imx519->sd, sd_state,
> +						   fmt->pad);
> +		/* update the code which could change due to vflip or hflip: */
> +		try_fmt->code = fmt->pad == IMAGE_PAD ?
> +				imx519_get_format_code(imx519) :
> +				MEDIA_BUS_FMT_SENSOR_DATA;
> +		fmt->format = *try_fmt;
> +	} else {
> +		if (fmt->pad == IMAGE_PAD) {
> +			imx519_update_image_pad_format(imx519, imx519->mode,
> +						       fmt);
> +			fmt->format.code =
> +			       imx519_get_format_code(imx519);
> +		} else {
> +			imx519_update_metadata_pad_format(fmt);
> +		}
> +	}
> +
> +	mutex_unlock(&imx519->mutex);
> +	return 0;
> +}
> +
> +static
> +unsigned int imx519_get_frame_length(const struct imx519_mode *mode,
> +				     const struct v4l2_fract *timeperframe)
> +{
> +	u64 frame_length;
> +
> +	frame_length = (u64)timeperframe->numerator * IMX519_PIXEL_RATE;
> +	do_div(frame_length,
> +	       (u64)timeperframe->denominator * mode->line_length_pix);
> +
> +	if (WARN_ON(frame_length > IMX519_FRAME_LENGTH_MAX))
> +		frame_length = IMX519_FRAME_LENGTH_MAX;
> +
> +	return max_t(unsigned int, frame_length, mode->height);
> +}
> +
> +static void imx519_set_framing_limits(struct imx519 *imx519)
> +{
> +	unsigned int frm_length_min, frm_length_default, hblank;
> +	const struct imx519_mode *mode = imx519->mode;
> +
> +	frm_length_min = imx519_get_frame_length(mode, &mode->timeperframe_min);
> +	frm_length_default =
> +		     imx519_get_frame_length(mode, &mode->timeperframe_default);
> +
> +	/* Default to no long exposure multiplier. */
> +	imx519->long_exp_shift = 0;
> +
> +	/* Update limits and set FPS to default */
> +	__v4l2_ctrl_modify_range(imx519->vblank, frm_length_min - mode->height,
> +				 ((1 << IMX519_LONG_EXP_SHIFT_MAX) *
> +					IMX519_FRAME_LENGTH_MAX) - mode->height,
> +				 1, frm_length_default - mode->height);
> +
> +	/* Setting this will adjust the exposure limits as well. */
> +	__v4l2_ctrl_s_ctrl(imx519->vblank, frm_length_default - mode->height);
> +
> +	/*
> +	 * Currently PPL is fixed to the mode specified value, so hblank
> +	 * depends on mode->width only, and is not changeable in any
> +	 * way other than changing the mode.
> +	 */
> +	hblank = mode->line_length_pix - mode->width;
> +	__v4l2_ctrl_modify_range(imx519->hblank, hblank, hblank, 1, hblank);
> +}
> +
> +static int imx519_set_pad_format(struct v4l2_subdev *sd,
> +				 struct v4l2_subdev_state *sd_state,
> +				 struct v4l2_subdev_format *fmt)
> +{
> +	struct v4l2_mbus_framefmt *framefmt;
> +	const struct imx519_mode *mode;
> +	struct imx519 *imx519 = to_imx519(sd);
> +
> +	if (fmt->pad >= NUM_PADS)
> +		return -EINVAL;
> +
> +	mutex_lock(&imx519->mutex);
> +
> +	if (fmt->pad == IMAGE_PAD) {
> +		/* Bayer order varies with flips */
> +		fmt->format.code = imx519_get_format_code(imx519);
> +
> +		mode = v4l2_find_nearest_size(supported_modes_10bit,
> +					      ARRAY_SIZE(supported_modes_10bit),
> +					      width, height,
> +					      fmt->format.width,
> +					      fmt->format.height);
> +		imx519_update_image_pad_format(imx519, mode, fmt);
> +		if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
> +			framefmt = v4l2_subdev_get_try_format(sd, sd_state,
> +							      fmt->pad);
> +			*framefmt = fmt->format;
> +		} else {
> +			imx519->mode = mode;
> +			imx519->fmt_code = fmt->format.code;
> +			imx519_set_framing_limits(imx519);
> +		}
> +	} else {
> +		if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
> +			framefmt = v4l2_subdev_get_try_format(sd, sd_state,
> +							      fmt->pad);
> +			*framefmt = fmt->format;
> +		} else {
> +			/* Only one embedded data mode is supported */
> +			imx519_update_metadata_pad_format(fmt);
> +		}
> +	}
> +
> +	mutex_unlock(&imx519->mutex);
> +
> +	return 0;
> +}
> +
> +static const struct v4l2_rect *
> +__imx519_get_pad_crop(struct imx519 *imx519, struct v4l2_subdev_state *sd_state,
> +		      unsigned int pad, enum v4l2_subdev_format_whence which)
> +{
> +	switch (which) {
> +	case V4L2_SUBDEV_FORMAT_TRY:
> +		return v4l2_subdev_get_try_crop(&imx519->sd, sd_state, pad);
> +	case V4L2_SUBDEV_FORMAT_ACTIVE:
> +		return &imx519->mode->crop;
> +	}
> +
> +	return NULL;
> +}
> +
> +static int imx519_get_selection(struct v4l2_subdev *sd,
> +				struct v4l2_subdev_state *sd_state,
> +				struct v4l2_subdev_selection *sel)
> +{
> +	switch (sel->target) {
> +	case V4L2_SEL_TGT_CROP: {
> +		struct imx519 *imx519 = to_imx519(sd);
> +
> +		mutex_lock(&imx519->mutex);
> +		sel->r = *__imx519_get_pad_crop(imx519, sd_state, sel->pad,
> +						sel->which);
> +		mutex_unlock(&imx519->mutex);
> +
> +		return 0;
> +	}
> +
> +	case V4L2_SEL_TGT_NATIVE_SIZE:
> +		sel->r.left = 0;
> +		sel->r.top = 0;
> +		sel->r.width = IMX519_NATIVE_WIDTH;
> +		sel->r.height = IMX519_NATIVE_HEIGHT;
> +
> +		return 0;
> +
> +	case V4L2_SEL_TGT_CROP_DEFAULT:
> +	case V4L2_SEL_TGT_CROP_BOUNDS:
> +		sel->r.left = IMX519_PIXEL_ARRAY_LEFT;
> +		sel->r.top = IMX519_PIXEL_ARRAY_TOP;
> +		sel->r.width = IMX519_PIXEL_ARRAY_WIDTH;
> +		sel->r.height = IMX519_PIXEL_ARRAY_HEIGHT;
> +
> +		return 0;
> +	}
> +
> +	return -EINVAL;
> +}
> +
> +/* Start streaming */
> +static int imx519_start_streaming(struct imx519 *imx519)
> +{
> +	struct i2c_client *client = v4l2_get_subdevdata(&imx519->sd);
> +	const struct imx519_reg_list *reg_list;
> +	int ret;
> +
> +	if (!imx519->common_regs_written) {
> +		ret = imx519_write_regs(imx519, mode_common_regs,
> +					ARRAY_SIZE(mode_common_regs));
> +
> +		if (ret) {
> +			dev_err(&client->dev, "%s failed to set common settings\n",
> +				__func__);
> +			return ret;
> +		}
> +		imx519->common_regs_written = true;
> +	}
> +
> +	/* Apply default values of current mode */
> +	reg_list = &imx519->mode->reg_list;
> +	ret = imx519_write_regs(imx519, reg_list->regs, reg_list->num_of_regs);
> +	if (ret) {
> +		dev_err(&client->dev, "%s failed to set mode\n", __func__);
> +		return ret;
> +	}
> +
> +	/* Apply customized values from user */
> +	ret =  __v4l2_ctrl_handler_setup(imx519->sd.ctrl_handler);
> +	if (ret)
> +		return ret;
> +
> +	/* set stream on register */
> +	return imx519_write_reg(imx519, IMX519_REG_MODE_SELECT,
> +				IMX519_REG_VALUE_08BIT, IMX519_MODE_STREAMING);
> +}
> +
> +/* Stop streaming */
> +static void imx519_stop_streaming(struct imx519 *imx519)
> +{
> +	struct i2c_client *client = v4l2_get_subdevdata(&imx519->sd);
> +	int ret;
> +
> +	/* set stream off register */
> +	ret = imx519_write_reg(imx519, IMX519_REG_MODE_SELECT,
> +			       IMX519_REG_VALUE_08BIT, IMX519_MODE_STANDBY);
> +	if (ret)
> +		dev_err(&client->dev, "%s failed to set stream\n", __func__);
> +
> +	__v4l2_ctrl_grab(imx519->vflip, false);
> +	__v4l2_ctrl_grab(imx519->hflip, false);
> +}
> +
> +static int imx519_set_stream(struct v4l2_subdev *sd, int enable)
> +{
> +	struct imx519 *imx519 = to_imx519(sd);
> +	struct i2c_client *client = v4l2_get_subdevdata(sd);
> +	int ret = 0;
> +
> +	mutex_lock(&imx519->mutex);
> +	if (imx519->streaming == enable) {
> +		mutex_unlock(&imx519->mutex);
> +		return 0;
> +	}
> +
> +	if (enable) {
> +		ret = pm_runtime_get_sync(&client->dev);
> +		if (ret < 0) {
> +			pm_runtime_put_noidle(&client->dev);
> +			goto err_unlock;
> +		}
> +
> +		/*
> +		 * Apply default & customized values
> +		 * and then start streaming.
> +		 */
> +		ret = imx519_start_streaming(imx519);
> +		if (ret)
> +			goto err_rpm_put;
> +	} else {
> +		imx519_stop_streaming(imx519);
> +		pm_runtime_put(&client->dev);
> +	}
> +
> +	imx519->streaming = enable;
> +
> +	/* vflip and hflip cannot change during streaming */
> +	__v4l2_ctrl_grab(imx519->vflip, enable);
> +	__v4l2_ctrl_grab(imx519->hflip, enable);
> +
> +	mutex_unlock(&imx519->mutex);
> +
> +	return ret;
> +
> +err_rpm_put:
> +	pm_runtime_put(&client->dev);
> +err_unlock:
> +	mutex_unlock(&imx519->mutex);
> +
> +	return ret;
> +}
> +
> +/* Power/clock management functions */
> +static int imx519_power_on(struct device *dev)
> +{
> +	struct i2c_client *client = to_i2c_client(dev);
> +	struct v4l2_subdev *sd = i2c_get_clientdata(client);
> +	struct imx519 *imx519 = to_imx519(sd);
> +	int ret;
> +
> +	ret = regulator_bulk_enable(IMX519_NUM_SUPPLIES,
> +				    imx519->supplies);
> +	if (ret) {
> +		dev_err(&client->dev, "%s: failed to enable regulators\n",
> +			__func__);
> +		return ret;
> +	}
> +
> +	ret = clk_prepare_enable(imx519->xclk);
> +	if (ret) {
> +		dev_err(&client->dev, "%s: failed to enable clock\n",
> +			__func__);
> +		goto reg_off;
> +	}
> +
> +	gpiod_set_value_cansleep(imx519->reset_gpio, 1);
> +	usleep_range(IMX519_XCLR_MIN_DELAY_US,
> +		     IMX519_XCLR_MIN_DELAY_US + IMX519_XCLR_DELAY_RANGE_US);
> +
> +	return 0;
> +
> +reg_off:
> +	regulator_bulk_disable(IMX519_NUM_SUPPLIES, imx519->supplies);
> +
> +	return ret;
> +}
> +
> +static int imx519_power_off(struct device *dev)
> +{
> +	struct i2c_client *client = to_i2c_client(dev);
> +	struct v4l2_subdev *sd = i2c_get_clientdata(client);
> +	struct imx519 *imx519 = to_imx519(sd);
> +
> +	gpiod_set_value_cansleep(imx519->reset_gpio, 0);
> +	regulator_bulk_disable(IMX519_NUM_SUPPLIES, imx519->supplies);
> +	clk_disable_unprepare(imx519->xclk);
> +
> +	/* Force reprogramming of the common registers when powered up again. */
> +	imx519->common_regs_written = false;
> +
> +	return 0;
> +}
> +
> +static int __maybe_unused imx519_suspend(struct device *dev)
> +{
> +	struct i2c_client *client = to_i2c_client(dev);
> +	struct v4l2_subdev *sd = i2c_get_clientdata(client);
> +	struct imx519 *imx519 = to_imx519(sd);
> +
> +	if (imx519->streaming)
> +		imx519_stop_streaming(imx519);
> +
> +	return 0;
> +}
> +
> +static int __maybe_unused imx519_resume(struct device *dev)
> +{
> +	struct i2c_client *client = to_i2c_client(dev);
> +	struct v4l2_subdev *sd = i2c_get_clientdata(client);
> +	struct imx519 *imx519 = to_imx519(sd);
> +	int ret;
> +
> +	if (imx519->streaming) {
> +		ret = imx519_start_streaming(imx519);
> +		if (ret)
> +			goto error;
> +	}
> +
> +	return 0;
> +
> +error:
> +	imx519_stop_streaming(imx519);
> +	imx519->streaming = 0;
> +	return ret;
> +}
> +
> +static int imx519_get_regulators(struct imx519 *imx519)
> +{
> +	struct i2c_client *client = v4l2_get_subdevdata(&imx519->sd);
> +	unsigned int i;
> +
> +	for (i = 0; i < IMX519_NUM_SUPPLIES; i++)
> +		imx519->supplies[i].supply = imx519_supply_name[i];
> +
> +	return devm_regulator_bulk_get(&client->dev,
> +				       IMX519_NUM_SUPPLIES,
> +				       imx519->supplies);
> +}
> +
> +/* Verify chip ID */
> +static int imx519_identify_module(struct imx519 *imx519, u32 expected_id)
> +{
> +	struct i2c_client *client = v4l2_get_subdevdata(&imx519->sd);
> +	int ret;
> +	u32 val;
> +
> +	ret = imx519_read_reg(imx519, IMX519_REG_CHIP_ID,
> +			      IMX519_REG_VALUE_16BIT, &val);
> +	if (ret) {
> +		dev_err(&client->dev, "failed to read chip id %x, with error %d\n",
> +			expected_id, ret);
> +		return ret;
> +	}
> +
> +	if (val != expected_id) {
> +		dev_err(&client->dev, "chip id mismatch: %x!=%x\n",
> +			expected_id, val);
> +		return -EIO;
> +	}
> +
> +	dev_info(&client->dev, "Device found is imx%x\n", val);
> +
> +	return 0;
> +}
> +
> +static const struct v4l2_subdev_core_ops imx519_core_ops = {
> +	.subscribe_event = v4l2_ctrl_subdev_subscribe_event,
> +	.unsubscribe_event = v4l2_event_subdev_unsubscribe,
> +};
> +
> +static const struct v4l2_subdev_video_ops imx519_video_ops = {
> +	.s_stream = imx519_set_stream,
> +};
> +
> +static const struct v4l2_subdev_pad_ops imx519_pad_ops = {
> +	.enum_mbus_code = imx519_enum_mbus_code,
> +	.get_fmt = imx519_get_pad_format,
> +	.set_fmt = imx519_set_pad_format,
> +	.get_selection = imx519_get_selection,
> +	.enum_frame_size = imx519_enum_frame_size,
> +};
> +
> +static const struct v4l2_subdev_ops imx519_subdev_ops = {
> +	.core = &imx519_core_ops,
> +	.video = &imx519_video_ops,
> +	.pad = &imx519_pad_ops,
> +};
> +
> +static const struct v4l2_subdev_internal_ops imx519_internal_ops = {
> +	.open = imx519_open,
> +};
> +
> +/* Initialize control handlers */
> +static int imx519_init_controls(struct imx519 *imx519)
> +{
> +	struct v4l2_ctrl_handler *ctrl_hdlr;
> +	struct i2c_client *client = v4l2_get_subdevdata(&imx519->sd);
> +	struct v4l2_fwnode_device_properties props;
> +	unsigned int i;
> +	int ret;
> +
> +	ctrl_hdlr = &imx519->ctrl_handler;
> +	ret = v4l2_ctrl_handler_init(ctrl_hdlr, 16);
> +	if (ret)
> +		return ret;
> +
> +	mutex_init(&imx519->mutex);
> +	ctrl_hdlr->lock = &imx519->mutex;
> +
> +	/* By default, PIXEL_RATE is read only */
> +	imx519->pixel_rate = v4l2_ctrl_new_std(ctrl_hdlr, &imx519_ctrl_ops,
> +					       V4L2_CID_PIXEL_RATE,
> +					       IMX519_PIXEL_RATE,
> +					       IMX519_PIXEL_RATE, 1,
> +					       IMX519_PIXEL_RATE);
> +
> +	/*
> +	 * Create the controls here, but mode specific limits are setup
> +	 * in the imx519_set_framing_limits() call below.
> +	 */
> +	imx519->vblank = v4l2_ctrl_new_std(ctrl_hdlr, &imx519_ctrl_ops,
> +					   V4L2_CID_VBLANK, 0, 0xffff, 1, 0);
> +	imx519->hblank = v4l2_ctrl_new_std(ctrl_hdlr, &imx519_ctrl_ops,
> +					   V4L2_CID_HBLANK, 0, 0xffff, 1, 0);
> +
> +	/* HBLANK is read-only for now, but does change with mode. */
> +	if (imx519->hblank)
> +		imx519->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY;
> +
> +	imx519->exposure = v4l2_ctrl_new_std(ctrl_hdlr, &imx519_ctrl_ops,
> +					     V4L2_CID_EXPOSURE,
> +					     IMX519_EXPOSURE_MIN,
> +					     IMX519_EXPOSURE_MAX,
> +					     IMX519_EXPOSURE_STEP,
> +					     IMX519_EXPOSURE_DEFAULT);
> +
> +	v4l2_ctrl_new_std(ctrl_hdlr, &imx519_ctrl_ops, V4L2_CID_ANALOGUE_GAIN,
> +			  IMX519_ANA_GAIN_MIN, IMX519_ANA_GAIN_MAX,
> +			  IMX519_ANA_GAIN_STEP, IMX519_ANA_GAIN_DEFAULT);
> +
> +	v4l2_ctrl_new_std(ctrl_hdlr, &imx519_ctrl_ops, V4L2_CID_DIGITAL_GAIN,
> +			  IMX519_DGTL_GAIN_MIN, IMX519_DGTL_GAIN_MAX,
> +			  IMX519_DGTL_GAIN_STEP, IMX519_DGTL_GAIN_DEFAULT);
> +
> +	imx519->hflip = v4l2_ctrl_new_std(ctrl_hdlr, &imx519_ctrl_ops,
> +					  V4L2_CID_HFLIP, 0, 1, 1, 0);
> +	if (imx519->hflip)
> +		imx519->hflip->flags |= V4L2_CTRL_FLAG_MODIFY_LAYOUT;
> +
> +	imx519->vflip = v4l2_ctrl_new_std(ctrl_hdlr, &imx519_ctrl_ops,
> +					  V4L2_CID_VFLIP, 0, 1, 1, 0);
> +	if (imx519->vflip)
> +		imx519->vflip->flags |= V4L2_CTRL_FLAG_MODIFY_LAYOUT;
> +
> +	v4l2_ctrl_new_std_menu_items(ctrl_hdlr, &imx519_ctrl_ops,
> +				     V4L2_CID_TEST_PATTERN,
> +				     ARRAY_SIZE(imx519_test_pattern_menu) - 1,
> +				     0, 0, imx519_test_pattern_menu);
> +	for (i = 0; i < 4; i++) {
> +		/*
> +		 * The assumption is that
> +		 * V4L2_CID_TEST_PATTERN_GREENR == V4L2_CID_TEST_PATTERN_RED + 1
> +		 * V4L2_CID_TEST_PATTERN_BLUE   == V4L2_CID_TEST_PATTERN_RED + 2
> +		 * V4L2_CID_TEST_PATTERN_GREENB == V4L2_CID_TEST_PATTERN_RED + 3
> +		 */
> +		v4l2_ctrl_new_std(ctrl_hdlr, &imx519_ctrl_ops,
> +				  V4L2_CID_TEST_PATTERN_RED + i,
> +				  IMX519_TEST_PATTERN_COLOUR_MIN,
> +				  IMX519_TEST_PATTERN_COLOUR_MAX,
> +				  IMX519_TEST_PATTERN_COLOUR_STEP,
> +				  IMX519_TEST_PATTERN_COLOUR_MAX);
> +		/* The "Solid color" pattern is white by default */
> +	}
> +
> +	if (ctrl_hdlr->error) {
> +		ret = ctrl_hdlr->error;
> +		dev_err(&client->dev, "%s control init failed (%d)\n",
> +			__func__, ret);
> +		goto error;
> +	}
> +
> +	ret = v4l2_fwnode_device_parse(&client->dev, &props);
> +	if (ret)
> +		goto error;
> +
> +	ret = v4l2_ctrl_new_fwnode_properties(ctrl_hdlr, &imx519_ctrl_ops,
> +					      &props);
> +	if (ret)
> +		goto error;
> +
> +	imx519->sd.ctrl_handler = ctrl_hdlr;
> +
> +	/* Setup exposure and frame/line length limits. */
> +	imx519_set_framing_limits(imx519);
> +
> +	return 0;
> +
> +error:
> +	v4l2_ctrl_handler_free(ctrl_hdlr);
> +	mutex_destroy(&imx519->mutex);
> +
> +	return ret;
> +}
> +
> +static void imx519_free_controls(struct imx519 *imx519)
> +{
> +	v4l2_ctrl_handler_free(imx519->sd.ctrl_handler);
> +	mutex_destroy(&imx519->mutex);
> +}
> +
> +static int imx519_check_hwcfg(struct device *dev)
> +{
> +	struct fwnode_handle *endpoint;
> +	struct v4l2_fwnode_endpoint ep_cfg = {
> +		.bus_type = V4L2_MBUS_CSI2_DPHY
> +	};
> +	int ret = -EINVAL;
> +
> +	endpoint = fwnode_graph_get_next_endpoint(dev_fwnode(dev), NULL);
> +	if (!endpoint) {
> +		dev_err(dev, "endpoint node not found\n");
> +		return -EINVAL;
> +	}
> +
> +	if (v4l2_fwnode_endpoint_alloc_parse(endpoint, &ep_cfg)) {
> +		dev_err(dev, "could not parse endpoint\n");
> +		goto error_out;
> +	}
> +
> +	/* Check the number of MIPI CSI2 data lanes */
> +	if (ep_cfg.bus.mipi_csi2.num_data_lanes != 2) {
> +		dev_err(dev, "only 2 data lanes are currently supported\n");
> +		goto error_out;
> +	}
> +
> +	/* Check the link frequency set in device tree */
> +	if (!ep_cfg.nr_of_link_frequencies) {
> +		dev_err(dev, "link-frequency property not found in DT\n");
> +		goto error_out;
> +	}
> +
> +	if (ep_cfg.nr_of_link_frequencies != 1 ||
> +	    ep_cfg.link_frequencies[0] != IMX519_DEFAULT_LINK_FREQ) {
> +		dev_err(dev, "Link frequency not supported: %lld\n",
> +			ep_cfg.link_frequencies[0]);
> +		goto error_out;
> +	}
> +
> +	ret = 0;
> +
> +error_out:
> +	v4l2_fwnode_endpoint_free(&ep_cfg);
> +	fwnode_handle_put(endpoint);
> +
> +	return ret;
> +}
> +
> +static const struct of_device_id imx519_dt_ids[] = {
> +	{ .compatible = "sony,imx519"},
> +	{ /* sentinel */ }
> +};
> +
> +static int imx519_probe(struct i2c_client *client)
> +{
> +	struct device *dev = &client->dev;
> +	struct imx519 *imx519;
> +	const struct of_device_id *match;
> +	u32 xclk_freq;
> +	int ret;
> +
> +	imx519 = devm_kzalloc(&client->dev, sizeof(*imx519), GFP_KERNEL);
> +	if (!imx519)
> +		return -ENOMEM;
> +
> +	v4l2_i2c_subdev_init(&imx519->sd, client, &imx519_subdev_ops);
> +
> +	match = of_match_device(imx519_dt_ids, dev);
> +	if (!match)
> +		return -ENODEV;

You only handle a single device, do you need this?

> +
> +	/* Check the hardware configuration in device tree */
> +	if (imx519_check_hwcfg(dev))
> +		return -EINVAL;
> +
> +	/* Get system clock (xclk) */
> +	imx519->xclk = devm_clk_get(dev, NULL);
> +	if (IS_ERR(imx519->xclk)) {
> +		dev_err(dev, "failed to get xclk\n");
> +		return PTR_ERR(imx519->xclk);
> +	}
> +
> +	xclk_freq = clk_get_rate(imx519->xclk);
> +	if (xclk_freq != IMX519_XCLK_FREQ) {
> +		dev_err(dev, "xclk frequency not supported: %d Hz\n",
> +			xclk_freq);
> +		return -EINVAL;
> +	}
> +
> +	ret = imx519_get_regulators(imx519);
> +	if (ret) {
> +		dev_err(dev, "failed to get regulators\n");
> +		return ret;
> +	}
> +
> +	/* Request optional enable pin */
> +	imx519->reset_gpio = devm_gpiod_get_optional(dev, "reset",
> +						     GPIOD_OUT_HIGH);
> +
> +	/*
> +	 * The sensor must be powered for imx519_identify_module()
> +	 * to be able to read the CHIP_ID register
> +	 */
> +	ret = imx519_power_on(dev);
> +	if (ret)
> +		return ret;
> +
> +	ret = imx519_identify_module(imx519, IMX519_CHIP_ID);
> +	if (ret)
> +		goto error_power_off;
> +
> +	/* Set default mode to max resolution */
> +	imx519->mode = &supported_modes_10bit[0];
> +	imx519->fmt_code = MEDIA_BUS_FMT_SRGGB10_1X10;
> +
> +	/* Enable runtime PM and turn off the device */
> +	pm_runtime_set_active(dev);
> +	pm_runtime_enable(dev);
> +	pm_runtime_idle(dev);
> +
> +	/* This needs the pm runtime to be registered. */
> +	ret = imx519_init_controls(imx519);
> +	if (ret)
> +		goto error_power_off;
> +
> +	/* Initialize subdev */
> +	imx519->sd.internal_ops = &imx519_internal_ops;
> +	imx519->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE |
> +			    V4L2_SUBDEV_FL_HAS_EVENTS;
> +	imx519->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
> +
> +	/* Initialize source pads */
> +	imx519->pad[IMAGE_PAD].flags = MEDIA_PAD_FL_SOURCE;
> +	imx519->pad[METADATA_PAD].flags = MEDIA_PAD_FL_SOURCE;
> +
> +	ret = media_entity_pads_init(&imx519->sd.entity, NUM_PADS, imx519->pad);
> +	if (ret) {
> +		dev_err(dev, "failed to init entity pads: %d\n", ret);
> +		goto error_handler_free;
> +	}
> +
> +	ret = v4l2_async_register_subdev_sensor(&imx519->sd);
> +	if (ret < 0) {
> +		dev_err(dev, "failed to register sensor sub-device: %d\n", ret);
> +		goto error_media_entity;
> +	}
> +
> +	return 0;
> +
> +error_media_entity:
> +	media_entity_cleanup(&imx519->sd.entity);
> +
> +error_handler_free:
> +	imx519_free_controls(imx519);
> +
> +error_power_off:
> +	pm_runtime_disable(&client->dev);
> +	pm_runtime_set_suspended(&client->dev);
> +	imx519_power_off(&client->dev);
> +
> +	return ret;
> +}
> +
> +static void imx519_remove(struct i2c_client *client)
> +{
> +	struct v4l2_subdev *sd = i2c_get_clientdata(client);
> +	struct imx519 *imx519 = to_imx519(sd);
> +
> +	v4l2_async_unregister_subdev(sd);
> +	media_entity_cleanup(&sd->entity);
> +	imx519_free_controls(imx519);
> +
> +	pm_runtime_disable(&client->dev);
> +	if (!pm_runtime_status_suspended(&client->dev))
> +		imx519_power_off(&client->dev);
> +	pm_runtime_set_suspended(&client->dev);
> +}
> +
> +MODULE_DEVICE_TABLE(of, imx519_dt_ids);
> +
> +static const struct dev_pm_ops imx519_pm_ops = {
> +	SET_SYSTEM_SLEEP_PM_OPS(imx519_suspend, imx519_resume)
> +	SET_RUNTIME_PM_OPS(imx519_power_off, imx519_power_on, NULL)
> +};
> +
> +static struct i2c_driver imx519_i2c_driver = {
> +	.driver = {
> +		.name = "imx519",
> +		.of_match_table	= imx519_dt_ids,
> +		.pm = &imx519_pm_ops,
> +	},
> +	.probe_new = imx519_probe,
> +	.remove = imx519_remove,
> +};
> +
> +module_i2c_driver(imx519_i2c_driver);
> +
> +MODULE_AUTHOR("Lee Jackson <lee.jackson@arducam.com>");
> +MODULE_DESCRIPTION("Sony IMX519 sensor driver");
> +MODULE_LICENSE("GPL v2");
>

On Sat, Sep 02, 2023 at 12:57:56PM +0000, Sakari Ailus wrote:
> On Thu, Jul 27, 2023 at 09:11:08PM +0530, Umang Jain wrote:
> > From: Lee Jackson <lee.jackson@arducam.com>
> > 
> > Adds a driver for the 16MPix IMX519 CSI2 sensor.

Commit messages must be written in the imperative mood, so s/Adds/Add/

> > Whilst the sensor supports 2 or 4 CSI2 data lanes, this driver
> > currently only supports 2 lanes. The driver also supports
> > Phase Detection Auto Focus (PDAF).
> > 
> > The following Bayer modes are currently available:
> > 
> > 4656x3496 10-bit @ 10fps
> > 3840x2160 10-bit (cropped) @ 21fps
> > 2328x1748 10-bit (binned) @ 30fps
> > 1920x1080 10-bit (cropped/binned) @ 60fps
> > 1280x720 10-bit (cropped/binned) @ 120fps
> > 
> > The imx519 driver to adverise support for embedded data streams.

Spelling mistakes.

> > The imx519 sensor subdevice overloads the media pad to differentiate
> > between image stream (pad 0) and embedded data stream (pad 1) when
> > performing the v4l2_subdev_pad_ops functions.

This needs to be changed to use the streams API.

> > Signed-off-by: Umang Jain <umang.jain@ideasonboard.com>
> > Tested-by: Umang Jain <umang.jain@ideasonboard.com>

Also, the driver must be tested against the upstream kernel.

> > ---
> >  MAINTAINERS                |    8 +
> >  drivers/media/i2c/Kconfig  |   11 +
> >  drivers/media/i2c/Makefile |    1 +
> >  drivers/media/i2c/imx519.c | 2134 ++++++++++++++++++++++++++++++++++++
> >  4 files changed, 2154 insertions(+)
> >  create mode 100644 drivers/media/i2c/imx519.c
> > 
> > diff --git a/MAINTAINERS b/MAINTAINERS
> > index 63c7ce10a4ba..e5a33733f928 100644
> > --- a/MAINTAINERS
> > +++ b/MAINTAINERS
> > @@ -19747,6 +19747,14 @@ T:	git git://linuxtv.org/media_tree.git
> >  F:	Documentation/devicetree/bindings/media/i2c/sony,imx415.yaml
> >  F:	drivers/media/i2c/imx415.c
> >  
> > +SONY IMX519 SENSOR DRIVER
> > +M:	Lee Jackson <lee.jackson@arducam.com>
> > +L:	linux-media@vger.kernel.org
> > +S:	Maintained
> > +T:	git git://linuxtv.org/media_tree.git
> > +F:	Documentation/devicetree/bindings/media/i2c/sony,imx519.yaml
> > +F:	drivers/media/i2c/imx519.c
> > +
> >  SONY MEMORYSTICK SUBSYSTEM
> >  M:	Maxim Levitsky <maximlevitsky@gmail.com>
> >  M:	Alex Dubov <oakad@yahoo.com>
> > diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig
> > index 256d55bb2b1d..ebc2c7c42c53 100644
> > --- a/drivers/media/i2c/Kconfig
> > +++ b/drivers/media/i2c/Kconfig
> > @@ -255,6 +255,17 @@ config VIDEO_IMX415
> >  	  To compile this driver as a module, choose M here: the
> >  	  module will be called imx415.
> >  
> > +config VIDEO_IMX519
> > +	tristate "Arducam IMX519 sensor support"

Why is this Arducam-specific ?

> > +	depends on I2C && VIDEO_DEV
> > +	select VIDEO_V4L2_SUBDEV_API
> > +	help
> > +	  This is a Video4Linux2 sensor driver for the Arducam
> > +	  IMX519 camera.
> > +
> > +	  To compile this driver as a module, choose M here: the
> > +	  module will be called IMX519.

Not quite right.

> > +
> >  config VIDEO_MAX9271_LIB
> >  	tristate
> >  
> > diff --git a/drivers/media/i2c/Makefile b/drivers/media/i2c/Makefile
> > index b44dacf935f4..872b98e5443f 100644
> > --- a/drivers/media/i2c/Makefile
> > +++ b/drivers/media/i2c/Makefile
> > @@ -49,6 +49,7 @@ obj-$(CONFIG_VIDEO_IMX335) += imx335.o
> >  obj-$(CONFIG_VIDEO_IMX355) += imx355.o
> >  obj-$(CONFIG_VIDEO_IMX412) += imx412.o
> >  obj-$(CONFIG_VIDEO_IMX415) += imx415.o
> > +obj-$(CONFIG_VIDEO_IMX519) += imx519.o
> >  obj-$(CONFIG_VIDEO_IR_I2C) += ir-kbd-i2c.o
> >  obj-$(CONFIG_VIDEO_ISL7998X) += isl7998x.o
> >  obj-$(CONFIG_VIDEO_KS0127) += ks0127.o
> > diff --git a/drivers/media/i2c/imx519.c b/drivers/media/i2c/imx519.c
> > new file mode 100644
> > index 000000000000..54420b7738f1
> > --- /dev/null
> > +++ b/drivers/media/i2c/imx519.c
> > @@ -0,0 +1,2134 @@
> > +// SPDX-License-Identifier: GPL-2.0
> > +/*
> > + * A V4L2 driver for Sony IMX519 cameras.
> > + * Copyright (C) 2023 Arducam Technology co., Ltd.
> > + *
> > + */
> > +#include <asm/unaligned.h>
> > +#include <linux/clk.h>
> > +#include <linux/delay.h>
> > +#include <linux/gpio/consumer.h>
> > +#include <linux/i2c.h>
> > +#include <linux/module.h>
> > +#include <linux/of_device.h>
> > +#include <linux/pm_runtime.h>
> > +#include <linux/regulator/consumer.h>
> > +#include <media/v4l2-ctrls.h>
> > +#include <media/v4l2-device.h>
> > +#include <media/v4l2-event.h>
> > +#include <media/v4l2-fwnode.h>
> > +#include <media/v4l2-mediabus.h>
> > +
> > +#define IMX519_REG_VALUE_08BIT		1
> > +#define IMX519_REG_VALUE_16BIT		2
> > +
> > +/* Chip ID */
> > +#define IMX519_REG_CHIP_ID		0x0016
> > +#define IMX519_CHIP_ID			0x0519
> > +
> > +#define IMX519_REG_MODE_SELECT		0x0100
> > +#define IMX519_MODE_STANDBY		0x00
> > +#define IMX519_MODE_STREAMING		0x01
> > +
> > +#define IMX519_REG_ORIENTATION		0x101
> > +
> > +#define IMX519_XCLK_FREQ		24000000
> > +
> > +#define IMX519_DEFAULT_LINK_FREQ	408000000
> > +
> > +/* Pixel rate is fixed at 426MHz for all the modes */
> > +#define IMX519_PIXEL_RATE		426666667
> > +
> > +/* V_TIMING internal */
> > +#define IMX519_REG_FRAME_LENGTH		0x0340
> > +#define IMX519_FRAME_LENGTH_MAX		0xffdc
> > +
> > +/* Long exposure multiplier */
> > +#define IMX519_LONG_EXP_SHIFT_MAX	7
> > +#define IMX519_LONG_EXP_SHIFT_REG	0x3100
> > +
> > +/* Exposure control */
> > +#define IMX519_REG_EXPOSURE		0x0202
> > +#define IMX519_EXPOSURE_OFFSET		32
> > +#define IMX519_EXPOSURE_MIN		20
> > +#define IMX519_EXPOSURE_STEP		1
> > +#define IMX519_EXPOSURE_DEFAULT		0x3e8
> > +#define IMX519_EXPOSURE_MAX		(IMX519_FRAME_LENGTH_MAX - \
> > +					 IMX519_EXPOSURE_OFFSET)
> > +
> > +/* Analog gain control */
> > +#define IMX519_REG_ANALOG_GAIN		0x0204
> > +#define IMX519_ANA_GAIN_MIN		0
> > +#define IMX519_ANA_GAIN_MAX		960
> > +#define IMX519_ANA_GAIN_STEP		1
> > +#define IMX519_ANA_GAIN_DEFAULT		0x0
> > +
> > +/* Digital gain control */
> > +#define IMX519_REG_DIGITAL_GAIN		0x020e
> > +#define IMX519_DGTL_GAIN_MIN		0x0100
> > +#define IMX519_DGTL_GAIN_MAX		0xffff
> > +#define IMX519_DGTL_GAIN_DEFAULT	0x0100
> > +#define IMX519_DGTL_GAIN_STEP		1
> > +
> > +/* Test Pattern Control */
> > +#define IMX519_REG_TEST_PATTERN		0x0600
> > +#define IMX519_TEST_PATTERN_DISABLE	0
> > +#define IMX519_TEST_PATTERN_SOLID_COLOR	1
> > +#define IMX519_TEST_PATTERN_COLOR_BARS	2
> > +#define IMX519_TEST_PATTERN_GREY_COLOR	3
> > +#define IMX519_TEST_PATTERN_PN9		4
> > +
> > +/* Test pattern colour components */
> > +#define IMX519_REG_TEST_PATTERN_R	0x0602
> > +#define IMX519_REG_TEST_PATTERN_GR	0x0604
> > +#define IMX519_REG_TEST_PATTERN_B	0x0606
> > +#define IMX519_REG_TEST_PATTERN_GB	0x0608
> > +#define IMX519_TEST_PATTERN_COLOUR_MIN	0
> > +#define IMX519_TEST_PATTERN_COLOUR_MAX	0x0fff
> > +#define IMX519_TEST_PATTERN_COLOUR_STEP	1
> > +#define IMX519_TEST_PATTERN_R_DEFAULT	IMX519_TEST_PATTERN_COLOUR_MAX
> > +#define IMX519_TEST_PATTERN_GR_DEFAULT	0
> > +#define IMX519_TEST_PATTERN_B_DEFAULT	0
> > +#define IMX519_TEST_PATTERN_GB_DEFAULT	0
> > +
> > +/* Embedded metadata stream structure */
> > +#define IMX519_EMBEDDED_LINE_WIDTH	(5820 * 3)
> > +#define IMX519_NUM_EMBEDDED_LINES	1
> > +
> > +/* IMX519 native and active pixel array size. */
> > +#define IMX519_NATIVE_WIDTH		4672U
> > +#define IMX519_NATIVE_HEIGHT		3648U
> > +#define IMX519_PIXEL_ARRAY_LEFT		8U
> > +#define IMX519_PIXEL_ARRAY_TOP		48U
> > +#define IMX519_PIXEL_ARRAY_WIDTH	4656U
> > +#define IMX519_PIXEL_ARRAY_HEIGHT	3496U
> > +
> > +enum pad_types {
> > +	IMAGE_PAD,
> > +	METADATA_PAD,
> 
> With streams, you only need one pad. (See that imx390 driver for an
> example (below).)
> 
> > +	NUM_PADS
> > +};
> > +
> > +struct imx519_reg {
> > +	u16 address;
> > +	u8 val;
> > +};
> > +
> > +struct imx519_reg_list {
> > +	unsigned int num_of_regs;
> > +	const struct imx519_reg *regs;
> > +};
> > +
> > +/* Mode : resolution and related config&values */
> > +struct imx519_mode {
> > +	/* Frame width */
> > +	unsigned int width;
> > +
> > +	/* Frame height */
> > +	unsigned int height;
> > +
> > +	/* H-timing in pixels */
> > +	unsigned int line_length_pix;
> > +
> > +	/* Analog crop rectangle. */
> > +	struct v4l2_rect crop;
> > +
> > +	/* Highest possible framerate. */
> > +	struct v4l2_fract timeperframe_min;
> > +
> > +	/* Default framerate. */
> > +	struct v4l2_fract timeperframe_default;
> > +
> > +	/* Default register values */
> > +	struct imx519_reg_list reg_list;
> > +};
> > +
> > +static const struct imx519_reg mode_common_regs[] = {
> > +	{0x0100, 0x00},
> > +	{0x0136, 0x18},
> > +	{0x0137, 0x00},
> > +	{0x3c7e, 0x01},
> > +	{0x3c7f, 0x07},
> > +	{0x3020, 0x00},
> > +	{0x3e35, 0x01},
> > +	{0x3f7f, 0x01},
> > +	{0x5609, 0x57},
> > +	{0x5613, 0x51},
> > +	{0x561f, 0x5e},
> > +	{0x5623, 0xd2},
> > +	{0x5637, 0x11},
> > +	{0x5657, 0x11},
> > +	{0x5659, 0x12},
> > +	{0x5733, 0x60},
> > +	{0x5905, 0x57},
> > +	{0x590f, 0x51},
> > +	{0x591b, 0x5e},
> > +	{0x591f, 0xd2},
> > +	{0x5933, 0x11},
> > +	{0x5953, 0x11},
> > +	{0x5955, 0x12},
> > +	{0x5a2f, 0x60},
> > +	{0x5a85, 0x57},
> > +	{0x5a8f, 0x51},
> > +	{0x5a9b, 0x5e},
> > +	{0x5a9f, 0xd2},
> > +	{0x5ab3, 0x11},
> > +	{0x5ad3, 0x11},
> > +	{0x5ad5, 0x12},
> > +	{0x5baf, 0x60},
> > +	{0x5c15, 0x2a},
> > +	{0x5c17, 0x80},
> > +	{0x5c19, 0x31},
> > +	{0x5c1b, 0x87},
> > +	{0x5c25, 0x25},
> > +	{0x5c27, 0x7b},
> > +	{0x5c29, 0x2a},
> > +	{0x5c2b, 0x80},
> > +	{0x5c2d, 0x31},
> > +	{0x5c2f, 0x87},
> > +	{0x5c35, 0x2b},
> > +	{0x5c37, 0x81},
> > +	{0x5c39, 0x31},
> > +	{0x5c3b, 0x87},
> > +	{0x5c45, 0x25},
> > +	{0x5c47, 0x7b},
> > +	{0x5c49, 0x2a},
> > +	{0x5c4b, 0x80},
> > +	{0x5c4d, 0x31},
> > +	{0x5c4f, 0x87},
> > +	{0x5c55, 0x2d},
> > +	{0x5c57, 0x83},
> > +	{0x5c59, 0x32},
> > +	{0x5c5b, 0x88},
> > +	{0x5c65, 0x29},
> > +	{0x5c67, 0x7f},
> > +	{0x5c69, 0x2e},
> > +	{0x5c6b, 0x84},
> > +	{0x5c6d, 0x32},
> > +	{0x5c6f, 0x88},
> > +	{0x5e69, 0x04},
> > +	{0x5e9d, 0x00},
> > +	{0x5f18, 0x10},
> > +	{0x5f1a, 0x0e},
> > +	{0x5f20, 0x12},
> > +	{0x5f22, 0x10},
> > +	{0x5f24, 0x0e},
> > +	{0x5f28, 0x10},
> > +	{0x5f2a, 0x0e},
> > +	{0x5f30, 0x12},
> > +	{0x5f32, 0x10},
> > +	{0x5f34, 0x0e},
> > +	{0x5f38, 0x0f},
> > +	{0x5f39, 0x0d},
> > +	{0x5f3c, 0x11},
> > +	{0x5f3d, 0x0f},
> > +	{0x5f3e, 0x0d},
> > +	{0x5f61, 0x07},
> > +	{0x5f64, 0x05},
> > +	{0x5f67, 0x03},
> > +	{0x5f6a, 0x03},
> > +	{0x5f6d, 0x07},
> > +	{0x5f70, 0x07},
> > +	{0x5f73, 0x05},
> > +	{0x5f76, 0x02},
> > +	{0x5f79, 0x07},
> > +	{0x5f7c, 0x07},
> > +	{0x5f7f, 0x07},
> > +	{0x5f82, 0x07},
> > +	{0x5f85, 0x03},
> > +	{0x5f88, 0x02},
> > +	{0x5f8b, 0x01},
> > +	{0x5f8e, 0x01},
> > +	{0x5f91, 0x04},
> > +	{0x5f94, 0x05},
> > +	{0x5f97, 0x02},
> > +	{0x5f9d, 0x07},
> > +	{0x5fa0, 0x07},
> > +	{0x5fa3, 0x07},
> > +	{0x5fa6, 0x07},
> > +	{0x5fa9, 0x03},
> > +	{0x5fac, 0x01},
> > +	{0x5faf, 0x01},
> > +	{0x5fb5, 0x03},
> > +	{0x5fb8, 0x02},
> > +	{0x5fbb, 0x01},
> > +	{0x5fc1, 0x07},
> > +	{0x5fc4, 0x07},
> > +	{0x5fc7, 0x07},
> > +	{0x5fd1, 0x00},
> > +	{0x6302, 0x79},
> > +	{0x6305, 0x78},
> > +	{0x6306, 0xa5},
> > +	{0x6308, 0x03},
> > +	{0x6309, 0x20},
> > +	{0x630b, 0x0a},
> > +	{0x630d, 0x48},
> > +	{0x630f, 0x06},
> > +	{0x6311, 0xa4},
> > +	{0x6313, 0x03},
> > +	{0x6314, 0x20},
> > +	{0x6316, 0x0a},
> > +	{0x6317, 0x31},
> > +	{0x6318, 0x4a},
> > +	{0x631a, 0x06},
> > +	{0x631b, 0x40},
> > +	{0x631c, 0xa4},
> > +	{0x631e, 0x03},
> > +	{0x631f, 0x20},
> > +	{0x6321, 0x0a},
> > +	{0x6323, 0x4a},
> > +	{0x6328, 0x80},
> > +	{0x6329, 0x01},
> > +	{0x632a, 0x30},
> > +	{0x632b, 0x02},
> > +	{0x632c, 0x20},
> > +	{0x632d, 0x02},
> > +	{0x632e, 0x30},
> > +	{0x6330, 0x60},
> > +	{0x6332, 0x90},
> > +	{0x6333, 0x01},
> > +	{0x6334, 0x30},
> > +	{0x6335, 0x02},
> > +	{0x6336, 0x20},
> > +	{0x6338, 0x80},
> > +	{0x633a, 0xa0},
> > +	{0x633b, 0x01},
> > +	{0x633c, 0x60},
> > +	{0x633d, 0x02},
> > +	{0x633e, 0x60},
> > +	{0x633f, 0x01},
> > +	{0x6340, 0x30},
> > +	{0x6341, 0x02},
> > +	{0x6342, 0x20},
> > +	{0x6343, 0x03},
> > +	{0x6344, 0x80},
> > +	{0x6345, 0x03},
> > +	{0x6346, 0x90},
> > +	{0x6348, 0xf0},
> > +	{0x6349, 0x01},
> > +	{0x634a, 0x20},
> > +	{0x634b, 0x02},
> > +	{0x634c, 0x10},
> > +	{0x634d, 0x03},
> > +	{0x634e, 0x60},
> > +	{0x6350, 0xa0},
> > +	{0x6351, 0x01},
> > +	{0x6352, 0x60},
> > +	{0x6353, 0x02},
> > +	{0x6354, 0x50},
> > +	{0x6355, 0x02},
> > +	{0x6356, 0x60},
> > +	{0x6357, 0x01},
> > +	{0x6358, 0x30},
> > +	{0x6359, 0x02},
> > +	{0x635a, 0x30},
> > +	{0x635b, 0x03},
> > +	{0x635c, 0x90},
> > +	{0x635f, 0x01},
> > +	{0x6360, 0x10},
> > +	{0x6361, 0x01},
> > +	{0x6362, 0x40},
> > +	{0x6363, 0x02},
> > +	{0x6364, 0x50},
> > +	{0x6368, 0x70},
> > +	{0x636a, 0xa0},
> > +	{0x636b, 0x01},
> > +	{0x636c, 0x50},
> > +	{0x637d, 0xe4},
> > +	{0x637e, 0xb4},
> > +	{0x638c, 0x8e},
> > +	{0x638d, 0x38},
> > +	{0x638e, 0xe3},
> > +	{0x638f, 0x4c},
> > +	{0x6390, 0x30},
> > +	{0x6391, 0xc3},
> > +	{0x6392, 0xae},
> > +	{0x6393, 0xba},
> > +	{0x6394, 0xeb},
> > +	{0x6395, 0x6e},
> > +	{0x6396, 0x34},
> > +	{0x6397, 0xe3},
> > +	{0x6398, 0xcf},
> > +	{0x6399, 0x3c},
> > +	{0x639a, 0xf3},
> > +	{0x639b, 0x0c},
> > +	{0x639c, 0x30},
> > +	{0x639d, 0xc1},
> > +	{0x63b9, 0xa3},
> > +	{0x63ba, 0xfe},
> > +	{0x7600, 0x01},
> > +	{0x79a0, 0x01},
> > +	{0x79a1, 0x01},
> > +	{0x79a2, 0x01},
> > +	{0x79a3, 0x01},
> > +	{0x79a4, 0x01},
> > +	{0x79a5, 0x20},
> > +	{0x79a9, 0x00},
> > +	{0x79aa, 0x01},
> > +	{0x79ad, 0x00},
> > +	{0x79af, 0x00},
> > +	{0x8173, 0x01},
> > +	{0x835c, 0x01},
> > +	{0x8a74, 0x01},
> > +	{0x8c1f, 0x00},
> > +	{0x8c27, 0x00},
> > +	{0x8c3b, 0x03},
> > +	{0x9004, 0x0b},
> > +	{0x920c, 0x6a},
> > +	{0x920d, 0x22},
> > +	{0x920e, 0x6a},
> > +	{0x920f, 0x23},
> > +	{0x9214, 0x6a},
> > +	{0x9215, 0x20},
> > +	{0x9216, 0x6a},
> > +	{0x9217, 0x21},
> > +	{0x9385, 0x3e},
> > +	{0x9387, 0x1b},
> > +	{0x938d, 0x4d},
> > +	{0x938f, 0x43},
> > +	{0x9391, 0x1b},
> > +	{0x9395, 0x4d},
> > +	{0x9397, 0x43},
> > +	{0x9399, 0x1b},
> > +	{0x939d, 0x3e},
> > +	{0x939f, 0x2f},
> > +	{0x93a5, 0x43},
> > +	{0x93a7, 0x2f},
> > +	{0x93a9, 0x2f},
> > +	{0x93ad, 0x34},
> > +	{0x93af, 0x2f},
> > +	{0x93b5, 0x3e},
> > +	{0x93b7, 0x2f},
> > +	{0x93bd, 0x4d},
> > +	{0x93bf, 0x43},
> > +	{0x93c1, 0x2f},
> > +	{0x93c5, 0x4d},
> > +	{0x93c7, 0x43},
> > +	{0x93c9, 0x2f},
> > +	{0x974b, 0x02},
> > +	{0x995c, 0x8c},
> > +	{0x995d, 0x00},
> > +	{0x995e, 0x00},
> > +	{0x9963, 0x64},
> > +	{0x9964, 0x50},
> > +	{0xaa0a, 0x26},
> > +	{0xae03, 0x04},
> > +	{0xae04, 0x03},
> > +	{0xae05, 0x03},
> > +	{0xbc1c, 0x08},
> > +	{0xbcf1, 0x02},
> > +	{0x38a3, 0x00},
> > +};
> > +
> > +/* 16 mpix 10fps */
> > +static const struct imx519_reg mode_4656x3496_regs[] = {
> > +	{0x0111, 0x02},
> > +	{0x0112, 0x0a},
> > +	{0x0113, 0x0a},
> > +	{0x0114, 0x01},
> > +	{0x0342, 0x31},
> > +	{0x0343, 0x6a},
> > +	{0x0340, 0x0d},
> > +	{0x0341, 0xf4},
> > +	{0x0344, 0x00},
> > +	{0x0345, 0x00},
> > +	{0x0346, 0x00},
> > +	{0x0347, 0x00},
> > +	{0x0348, 0x12},
> > +	{0x0349, 0x2f},
> > +	{0x034a, 0x0d},
> > +	{0x034b, 0xa7},
> > +	{0x0220, 0x00},
> > +	{0x0221, 0x11},
> > +	{0x0222, 0x01},
> > +	{0x0900, 0x00},
> > +	{0x0901, 0x11},
> > +	{0x0902, 0x0a},
> > +	{0x3f4c, 0x01},
> > +	{0x3f4d, 0x01},
> > +	{0x4254, 0x7f},
> > +	{0x0401, 0x00},
> > +	{0x0404, 0x00},
> > +	{0x0405, 0x10},
> > +	{0x0408, 0x00},
> > +	{0x0409, 0x00},
> > +	{0x040a, 0x00},
> > +	{0x040b, 0x00},
> > +	{0x040c, 0x12},
> > +	{0x040d, 0x30},
> > +	{0x040e, 0x0d},
> > +	{0x040f, 0xa8},
> > +	{0x034c, 0x12},
> > +	{0x034d, 0x30},
> > +	{0x034e, 0x0d},
> > +	{0x034f, 0xa8},
> > +	{0x0301, 0x06},
> > +	{0x0303, 0x04},
> > +	{0x0305, 0x06},
> > +	{0x0306, 0x01},
> > +	{0x0307, 0x40},
> > +	{0x0309, 0x0a},
> > +	{0x030b, 0x02},
> > +	{0x030d, 0x04},
> > +	{0x030e, 0x01},
> > +	{0x030f, 0x10},
> > +	{0x0310, 0x01},
> > +	{0x0820, 0x0a},
> > +	{0x0821, 0x20},
> > +	{0x0822, 0x00},
> > +	{0x0823, 0x00},
> > +	{0x3e20, 0x01},
> > +	{0x3e37, 0x01},
> > +	{0x3e3b, 0x00},
> > +	{0x38a4, 0x00},
> > +	{0x38a5, 0x00},
> > +	{0x38a6, 0x00},
> > +	{0x38a7, 0x00},
> > +	{0x38a8, 0x01},
> > +	{0x38a9, 0x23},
> > +	{0x38aa, 0x01},
> > +	{0x38ab, 0x23},
> > +	{0x0106, 0x00},
> > +	{0x0b00, 0x00},
> > +	{0x3230, 0x00},
> > +	{0x3f14, 0x01},
> > +	{0x3f3c, 0x01},
> > +	{0x3f0d, 0x0a},
> > +	{0x3fbc, 0x00},
> > +	{0x3c06, 0x00},
> > +	{0x3c07, 0x48},
> > +	{0x3c0a, 0x00},
> > +	{0x3c0b, 0x00},
> > +	{0x3f78, 0x00},
> > +	{0x3f79, 0x40},
> > +	{0x3f7c, 0x00},
> > +	{0x3f7d, 0x00},
> > +};
> > +
> > +/* 4k 21fps mode */
> > +static const struct imx519_reg mode_3840x2160_regs[] = {
> > +	{0x0111, 0x02},
> > +	{0x0112, 0x0a},
> > +	{0x0113, 0x0a},
> > +	{0x0114, 0x01},
> > +	{0x0342, 0x28},
> > +	{0x0343, 0xf6},
> > +	{0x0340, 0x08},
> > +	{0x0341, 0xd4},
> > +	{0x0344, 0x01},
> > +	{0x0345, 0x98},
> > +	{0x0346, 0x02},
> > +	{0x0347, 0xa0},
> > +	{0x0348, 0x10},
> > +	{0x0349, 0x97},
> > +	{0x034a, 0x0b},
> > +	{0x034b, 0x17},
> > +	{0x0220, 0x00},
> > +	{0x0221, 0x11},
> > +	{0x0222, 0x01},
> > +	{0x0900, 0x00},
> > +	{0x0901, 0x11},
> > +	{0x0902, 0x0a},
> > +	{0x3f4c, 0x01},
> > +	{0x3f4d, 0x01},
> > +	{0x4254, 0x7f},
> > +	{0x0401, 0x00},
> > +	{0x0404, 0x00},
> > +	{0x0405, 0x10},
> > +	{0x0408, 0x00},
> > +	{0x0409, 0x00},
> > +	{0x040a, 0x00},
> > +	{0x040b, 0x00},
> > +	{0x040c, 0x0f},
> > +	{0x040d, 0x00},
> > +	{0x040e, 0x08},
> > +	{0x040f, 0x70},
> > +	{0x034c, 0x0f},
> > +	{0x034d, 0x00},
> > +	{0x034e, 0x08},
> > +	{0x034f, 0x70},
> > +	{0x0301, 0x06},
> > +	{0x0303, 0x04},
> > +	{0x0305, 0x06},
> > +	{0x0306, 0x01},
> > +	{0x0307, 0x40},
> > +	{0x0309, 0x0a},
> > +	{0x030b, 0x02},
> > +	{0x030d, 0x04},
> > +	{0x030e, 0x01},
> > +	{0x030f, 0x10},
> > +	{0x0310, 0x01},
> > +	{0x0820, 0x0a},
> > +	{0x0821, 0x20},
> > +	{0x0822, 0x00},
> > +	{0x0823, 0x00},
> > +	{0x3e20, 0x01},
> > +	{0x3e37, 0x01},
> > +	{0x3e3b, 0x00},
> > +	{0x38a4, 0x00},
> > +	{0x38a5, 0x00},
> > +	{0x38a6, 0x00},
> > +	{0x38a7, 0x00},
> > +	{0x38a8, 0x00},
> > +	{0x38a9, 0xf0},
> > +	{0x38aa, 0x00},
> > +	{0x38ab, 0xb4},
> > +	{0x0106, 0x00},
> > +	{0x0b00, 0x00},
> > +	{0x3230, 0x00},
> > +	{0x3f14, 0x01},
> > +	{0x3f3c, 0x01},
> > +	{0x3f0d, 0x0a},
> > +	{0x3fbc, 0x00},
> > +	{0x3c06, 0x00},
> > +	{0x3c07, 0x48},
> > +	{0x3c0a, 0x00},
> > +	{0x3c0b, 0x00},
> > +	{0x3f78, 0x00},
> > +	{0x3f79, 0x40},
> > +	{0x3f7c, 0x00},
> > +	{0x3f7d, 0x00},
> > +};
> > +
> > +/* 2x2 binned 30fps mode */
> > +static const struct imx519_reg mode_2328x1748_regs[] = {
> > +	{0x0111, 0x02},
> > +	{0x0112, 0x0a},
> > +	{0x0113, 0x0a},
> > +	{0x0114, 0x01},
> > +	{0x0342, 0x19},
> > +	{0x0343, 0x70},
> > +	{0x0340, 0x08},
> > +	{0x0341, 0x88},
> > +	{0x0344, 0x00},
> > +	{0x0345, 0x00},
> > +	{0x0346, 0x00},
> > +	{0x0347, 0x00},
> > +	{0x0348, 0x12},
> > +	{0x0349, 0x2f},
> > +	{0x034a, 0x0d},
> > +	{0x034b, 0xa7},
> > +	{0x0220, 0x00},
> > +	{0x0221, 0x11},
> > +	{0x0222, 0x01},
> > +	{0x0900, 0x01},
> > +	{0x0901, 0x22},
> > +	{0x0902, 0x0a},
> > +	{0x3f4c, 0x05},
> > +	{0x3f4d, 0x03},
> > +	{0x4254, 0x7f},
> > +	{0x0401, 0x00},
> > +	{0x0404, 0x00},
> > +	{0x0405, 0x10},
> > +	{0x0408, 0x00},
> > +	{0x0409, 0x00},
> > +	{0x040a, 0x00},
> > +	{0x040b, 0x00},
> > +	{0x040c, 0x09},
> > +	{0x040d, 0x18},
> > +	{0x040e, 0x06},
> > +	{0x040f, 0xd4},
> > +	{0x034c, 0x09},
> > +	{0x034d, 0x18},
> > +	{0x034e, 0x06},
> > +	{0x034f, 0xd4},
> > +	{0x0301, 0x06},
> > +	{0x0303, 0x04},
> > +	{0x0305, 0x06},
> > +	{0x0306, 0x01},
> > +	{0x0307, 0x40},
> > +	{0x0309, 0x0a},
> > +	{0x030b, 0x02},
> > +	{0x030d, 0x04},
> > +	{0x030e, 0x01},
> > +	{0x030f, 0x10},
> > +	{0x0310, 0x01},
> > +	{0x0820, 0x0a},
> > +	{0x0821, 0x20},
> > +	{0x0822, 0x00},
> > +	{0x0823, 0x00},
> > +	{0x3e20, 0x01},
> > +	{0x3e37, 0x01},
> > +	{0x3e3b, 0x00},
> > +	{0x38a4, 0x00},
> > +	{0x38a5, 0x00},
> > +	{0x38a6, 0x00},
> > +	{0x38a7, 0x00},
> > +	{0x38a8, 0x00},
> > +	{0x38a9, 0x91},
> > +	{0x38aa, 0x00},
> > +	{0x38ab, 0x91},
> > +	{0x0106, 0x00},
> > +	{0x0b00, 0x00},
> > +	{0x3230, 0x00},
> > +	{0x3f14, 0x01},
> > +	{0x3f3c, 0x01},
> > +	{0x3f0d, 0x0a},
> > +	{0x3fbc, 0x00},
> > +	{0x3c06, 0x00},
> > +	{0x3c07, 0x48},
> > +	{0x3c0a, 0x00},
> > +	{0x3c0b, 0x00},
> > +	{0x3f78, 0x00},
> > +	{0x3f79, 0x40},
> > +	{0x3f7c, 0x00},
> > +	{0x3f7d, 0x00},
> > +};
> > +
> > +/* 1080p 60fps mode */
> > +static const struct imx519_reg mode_1920x1080_regs[] = {
> > +	{0x0111, 0x02},
> > +	{0x0112, 0x0a},
> > +	{0x0113, 0x0a},
> > +	{0x0114, 0x01},
> > +	{0x0342, 0x17},
> > +	{0x0343, 0x8b},
> > +	{0x0340, 0x04},
> > +	{0x0341, 0x9c},
> > +	{0x0344, 0x01},
> > +	{0x0345, 0x98},
> > +	{0x0346, 0x02},
> > +	{0x0347, 0xa2},
> > +	{0x0348, 0x10},
> > +	{0x0349, 0x97},
> > +	{0x034a, 0x0b},
> > +	{0x034b, 0x15},
> > +	{0x0220, 0x00},
> > +	{0x0221, 0x11},
> > +	{0x0222, 0x01},
> > +	{0x0900, 0x01},
> > +	{0x0901, 0x22},
> > +	{0x0902, 0x0a},
> > +	{0x3f4c, 0x05},
> > +	{0x3f4d, 0x03},
> > +	{0x4254, 0x7f},
> > +	{0x0401, 0x00},
> > +	{0x0404, 0x00},
> > +	{0x0405, 0x10},
> > +	{0x0408, 0x00},
> > +	{0x0409, 0x00},
> > +	{0x040a, 0x00},
> > +	{0x040b, 0x00},
> > +	{0x040c, 0x07},
> > +	{0x040d, 0x80},
> > +	{0x040e, 0x04},
> > +	{0x040f, 0x38},
> > +	{0x034c, 0x07},
> > +	{0x034d, 0x80},
> > +	{0x034e, 0x04},
> > +	{0x034f, 0x38},
> > +	{0x0301, 0x06},
> > +	{0x0303, 0x04},
> > +	{0x0305, 0x06},
> > +	{0x0306, 0x01},
> > +	{0x0307, 0x40},
> > +	{0x0309, 0x0a},
> > +	{0x030b, 0x02},
> > +	{0x030d, 0x04},
> > +	{0x030e, 0x01},
> > +	{0x030f, 0x10},
> > +	{0x0310, 0x01},
> > +	{0x0820, 0x0a},
> > +	{0x0821, 0x20},
> > +	{0x0822, 0x00},
> > +	{0x0823, 0x00},
> > +	{0x3e20, 0x01},
> > +	{0x3e37, 0x01},
> > +	{0x3e3b, 0x00},
> > +	{0x38a4, 0x00},
> > +	{0x38a5, 0x00},
> > +	{0x38a6, 0x00},
> > +	{0x38a7, 0x00},
> > +	{0x38a8, 0x00},
> > +	{0x38a9, 0x78},
> > +	{0x38aa, 0x00},
> > +	{0x38ab, 0x5a},
> > +	{0x0106, 0x00},
> > +	{0x0b00, 0x00},
> > +	{0x3230, 0x00},
> > +	{0x3f14, 0x01},
> > +	{0x3f3c, 0x01},
> > +	{0x3f0d, 0x0a},
> > +	{0x3fbc, 0x00},
> > +	{0x3c06, 0x00},
> > +	{0x3c07, 0x48},
> > +	{0x3c0a, 0x00},
> > +	{0x3c0b, 0x00},
> > +	{0x3f78, 0x00},
> > +	{0x3f79, 0x40},
> > +	{0x3f7c, 0x00},
> > +	{0x3f7d, 0x00},
> > +};
> > +
> > +/* 720p 120fps mode */
> > +static const struct imx519_reg mode_1280x720_regs[] = {
> > +	{0x0111, 0x02},
> > +	{0x0112, 0x0a},
> > +	{0x0113, 0x0a},
> > +	{0x0114, 0x01},
> > +	{0x0342, 0x18},
> > +	{0x0343, 0x00},
> > +	{0x0340, 0x03},
> > +	{0x0341, 0x34},
> > +	{0x0344, 0x04},
> > +	{0x0345, 0x18},
> > +	{0x0346, 0x04},
> > +	{0x0347, 0x12},
> > +	{0x0348, 0x0e},
> > +	{0x0349, 0x17},
> > +	{0x034a, 0x09},
> > +	{0x034b, 0xb6},
> > +	{0x0220, 0x00},
> > +	{0x0221, 0x11},
> > +	{0x0222, 0x01},
> > +	{0x0900, 0x01},
> > +	{0x0901, 0x22},
> > +	{0x0902, 0x0a},
> > +	{0x3f4c, 0x05},
> > +	{0x3f4d, 0x03},
> > +	{0x4254, 0x7f},
> > +	{0x0401, 0x00},
> > +	{0x0404, 0x00},
> > +	{0x0405, 0x10},
> > +	{0x0408, 0x00},
> > +	{0x0409, 0x00},
> > +	{0x040a, 0x00},
> > +	{0x040b, 0x00},
> > +	{0x040c, 0x05},
> > +	{0x040d, 0x00},
> > +	{0x040e, 0x02},
> > +	{0x040f, 0xd0},
> > +	{0x034c, 0x05},
> > +	{0x034d, 0x00},
> > +	{0x034e, 0x02},
> > +	{0x034f, 0xd0},
> > +	{0x0301, 0x06},
> > +	{0x0303, 0x04},
> > +	{0x0305, 0x06},
> > +	{0x0306, 0x01},
> > +	{0x0307, 0x40},
> > +	{0x0309, 0x0a},
> > +	{0x030b, 0x02},
> > +	{0x030d, 0x04},
> > +	{0x030e, 0x01},
> > +	{0x030f, 0x10},
> > +	{0x0310, 0x01},
> > +	{0x0820, 0x0a},
> > +	{0x0821, 0x20},
> > +	{0x0822, 0x00},
> > +	{0x0823, 0x00},
> > +	{0x3e20, 0x01},
> > +	{0x3e37, 0x01},
> > +	{0x3e3b, 0x00},
> > +	{0x38a4, 0x00},
> > +	{0x38a5, 0x00},
> > +	{0x38a6, 0x00},
> > +	{0x38a7, 0x00},
> > +	{0x38a8, 0x00},
> > +	{0x38a9, 0x50},
> > +	{0x38aa, 0x00},
> > +	{0x38ab, 0x3c},
> > +	{0x0106, 0x00},
> > +	{0x0b00, 0x00},
> > +	{0x3230, 0x00},
> > +	{0x3f14, 0x01},
> > +	{0x3f3c, 0x01},
> > +	{0x3f0d, 0x0a},
> > +	{0x3fbc, 0x00},
> > +	{0x3c06, 0x00},
> > +	{0x3c07, 0x48},
> > +	{0x3c0a, 0x00},
> > +	{0x3c0b, 0x00},
> > +	{0x3f78, 0x00},
> > +	{0x3f79, 0x40},
> > +	{0x3f7c, 0x00},
> > +	{0x3f7d, 0x00},
> > +};
> > +
> > +/* Mode configs */
> > +static const struct imx519_mode supported_modes_10bit[] = {
> > +	{
> > +		.width = 4656,
> > +		.height = 3496,
> > +		.line_length_pix = 0x316a,
> > +		.crop = {
> > +			.left = IMX519_PIXEL_ARRAY_LEFT,
> > +			.top = IMX519_PIXEL_ARRAY_TOP,
> > +			.width = 4656,
> > +			.height = 3496,
> > +		},
> > +		.timeperframe_min = {
> > +			.numerator = 100,
> > +			.denominator = 900
> > +		},
> > +		.timeperframe_default = {
> > +			.numerator = 100,
> > +			.denominator = 900
> > +		},
> > +		.reg_list = {
> > +			.num_of_regs = ARRAY_SIZE(mode_4656x3496_regs),
> > +			.regs = mode_4656x3496_regs,
> > +		}
> > +	},
> > +	{
> > +		.width = 3840,
> > +		.height = 2160,
> > +		.line_length_pix = 0x28f6,
> > +		.crop = {
> > +			.left = IMX519_PIXEL_ARRAY_LEFT + 408,
> > +			.top = IMX519_PIXEL_ARRAY_TOP + 672,
> > +			.width = 3840,
> > +			.height = 2160,
> > +		},
> > +		.timeperframe_min = {
> > +			.numerator = 100,
> > +			.denominator = 1800
> > +		},
> > +		.timeperframe_default = {
> > +			.numerator = 100,
> > +			.denominator = 1800
> > +		},
> > +		.reg_list = {
> > +			.num_of_regs = ARRAY_SIZE(mode_3840x2160_regs),
> > +			.regs = mode_3840x2160_regs,
> > +		}
> > +	},
> > +	{
> > +		.width = 2328,
> > +		.height = 1748,
> > +		.line_length_pix = 0x1970,
> > +		.crop = {
> > +			.left = IMX519_PIXEL_ARRAY_LEFT,
> > +			.top = IMX519_PIXEL_ARRAY_TOP,
> > +			.width = 4656,
> > +			.height = 3496,
> > +		},
> > +		.timeperframe_min = {
> > +			.numerator = 100,
> > +			.denominator = 3000
> > +		},
> > +		.timeperframe_default = {
> > +			.numerator = 100,
> > +			.denominator = 3000
> > +		},
> > +		.reg_list = {
> > +			.num_of_regs = ARRAY_SIZE(mode_2328x1748_regs),
> > +			.regs = mode_2328x1748_regs,
> > +		}
> > +	},
> > +	{
> > +		.width = 1920,
> > +		.height = 1080,
> > +		.line_length_pix = 0x178b,
> > +		.crop = {
> > +			.left = IMX519_PIXEL_ARRAY_LEFT + 408,
> > +			.top = IMX519_PIXEL_ARRAY_TOP + 674,
> > +			.width = 3840,
> > +			.height = 2160,
> > +		},
> > +		.timeperframe_min = {
> > +			.numerator = 100,
> > +			.denominator = 6000
> > +		},
> > +		.timeperframe_default = {
> > +			.numerator = 100,
> > +			.denominator = 6000
> > +		},
> > +		.reg_list = {
> > +			.num_of_regs = ARRAY_SIZE(mode_1920x1080_regs),
> > +			.regs = mode_1920x1080_regs,
> > +		}
> > +	},
> > +	{
> > +		.width = 1280,
> > +		.height = 720,
> > +		.line_length_pix = 0x1800,
> > +		.crop = {
> > +			.left = IMX519_PIXEL_ARRAY_LEFT + 1048,
> > +			.top = IMX519_PIXEL_ARRAY_TOP + 1042,
> > +			.width = 2560,
> > +			.height = 1440,
> > +		},
> > +		.timeperframe_min = {
> > +			.numerator = 100,
> > +			.denominator = 8000
> > +		},
> > +		.timeperframe_default = {
> > +			.numerator = 100,
> > +			.denominator = 8000
> > +		},
> > +		.reg_list = {
> > +			.num_of_regs = ARRAY_SIZE(mode_1280x720_regs),
> > +			.regs = mode_1280x720_regs,
> > +		}
> > +	}
> > +};
> > +
> > +/*
> > + * The supported formats.
> > + * This table MUST contain 4 entries per format, to cover the various flip
> > + * combinations in the order
> > + * - no flip
> > + * - h flip
> > + * - v flip
> > + * - h&v flips
> > + */
> > +static const u32 codes[] = {
> > +	/* 10-bit modes. */
> > +	MEDIA_BUS_FMT_SRGGB10_1X10,
> > +	MEDIA_BUS_FMT_SGRBG10_1X10,
> > +	MEDIA_BUS_FMT_SGBRG10_1X10,
> > +	MEDIA_BUS_FMT_SBGGR10_1X10,
> > +};
> > +
> > +static const char * const imx519_test_pattern_menu[] = {
> > +	"Disabled",
> > +	"Color Bars",
> > +	"Solid Color",
> > +	"Grey Color Bars",
> > +	"PN9"
> > +};
> > +
> > +static const int imx519_test_pattern_val[] = {
> > +	IMX519_TEST_PATTERN_DISABLE,
> > +	IMX519_TEST_PATTERN_COLOR_BARS,
> > +	IMX519_TEST_PATTERN_SOLID_COLOR,
> > +	IMX519_TEST_PATTERN_GREY_COLOR,
> > +	IMX519_TEST_PATTERN_PN9,
> > +};
> > +
> > +/* regulator supplies */
> > +static const char * const imx519_supply_name[] = {
> > +	/* Supplies can be enabled in any order */
> > +	"VANA",  /* Analog (2.8V) supply */
> > +	"VDIG",  /* Digital Core (1.05V) supply */
> > +	"VDDL",  /* IF (1.8V) supply */
> > +};
> > +
> > +#define IMX519_NUM_SUPPLIES ARRAY_SIZE(imx519_supply_name)
> 
> Please use ARRAY_SIZE() directly instead.
> 
> > +
> > +/*
> > + * Initialisation delay between XCLR low->high and the moment when the sensor
> > + * can start capture (i.e. can leave software standby), given by T7 in the
> > + * datasheet is 8ms.  This does include I2C setup time as well.
> > + *
> > + * Note, that delay between XCLR low->high and reading the CCI ID register (T6
> > + * in the datasheet) is much smaller - 600us.
> > + */
> > +#define IMX519_XCLR_MIN_DELAY_US	8000
> > +#define IMX519_XCLR_DELAY_RANGE_US	1000
> > +
> > +struct imx519 {
> > +	struct v4l2_subdev sd;
> > +	struct media_pad pad[NUM_PADS];
> > +
> > +	unsigned int fmt_code;
> > +
> > +	struct clk *xclk;
> > +
> > +	struct gpio_desc *reset_gpio;
> > +	struct regulator_bulk_data supplies[IMX519_NUM_SUPPLIES];
> > +
> > +	struct v4l2_ctrl_handler ctrl_handler;
> > +	/* V4L2 Controls */
> > +	struct v4l2_ctrl *pixel_rate;
> > +	struct v4l2_ctrl *exposure;
> > +	struct v4l2_ctrl *vflip;
> > +	struct v4l2_ctrl *hflip;
> > +	struct v4l2_ctrl *vblank;
> > +	struct v4l2_ctrl *hblank;
> > +
> > +	/* Current mode */
> > +	const struct imx519_mode *mode;
> > +
> > +	/*
> > +	 * Mutex for serialized access:
> > +	 * Protect sensor module set pad format and start/stop streaming safely.
> > +	 */
> > +	struct mutex mutex;
> > +
> > +	/* Streaming on/off */
> > +	bool streaming;
> > +
> > +	/* Rewrite common registers on stream on? */
> > +	bool common_regs_written;
> > +
> > +	/* Current long exposure factor in use. Set through V4L2_CID_VBLANK */
> > +	unsigned int long_exp_shift;
> > +};
> > +
> > +static inline struct imx519 *to_imx519(struct v4l2_subdev *_sd)
> 
> You could call the argument "sd" as well. Up to you.
> 
> > +{
> > +	return container_of(_sd, struct imx519, sd);
> > +}
> > +
> > +/* Read registers up to 2 at a time */
> > +static int imx519_read_reg(struct imx519 *imx519, u16 reg, u32 len, u32 *val)
> > +{
> > +	struct i2c_client *client = v4l2_get_subdevdata(&imx519->sd);
> > +	struct i2c_msg msgs[2];
> > +	u8 addr_buf[2] = { reg >> 8, reg & 0xff };
> > +	u8 data_buf[4] = { 0, };
> > +	int ret;
> > +
> > +	if (len > 4)
> > +		return -EINVAL;
> > +
> > +	/* Write register address */
> > +	msgs[0].addr = client->addr;
> > +	msgs[0].flags = 0;
> > +	msgs[0].len = ARRAY_SIZE(addr_buf);
> > +	msgs[0].buf = addr_buf;
> > +
> > +	/* Read data from register */
> > +	msgs[1].addr = client->addr;
> > +	msgs[1].flags = I2C_M_RD;
> > +	msgs[1].len = len;
> > +	msgs[1].buf = &data_buf[4 - len];
> > +
> > +	ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
> > +	if (ret != ARRAY_SIZE(msgs))
> > +		return -EIO;
> > +
> > +	*val = get_unaligned_be32(data_buf);
> > +
> > +	return 0;
> > +}
> > +
> > +/* Write registers up to 2 at a time */
> > +static int imx519_write_reg(struct imx519 *imx519, u16 reg, u32 len, u32 val)
> > +{
> > +	struct i2c_client *client = v4l2_get_subdevdata(&imx519->sd);
> > +	u8 buf[6];
> > +
> > +	if (len > 4)
> > +		return -EINVAL;
> > +
> > +	put_unaligned_be16(reg, buf);
> > +	put_unaligned_be32(val << (8 * (4 - len)), buf + 2);
> > +	if (i2c_master_send(client, buf, len + 2) != len + 2)
> > +		return -EIO;
> > +
> > +	return 0;
> > +}
> 
> We have V4L2 CCI helpers, please switch. (See
> drivers/media/v4l2-core/v4l2-cci.c .)
> 
> > +
> > +/* Write a list of registers */
> > +static int imx519_write_regs(struct imx519 *imx519,
> > +			     const struct imx519_reg *regs, u32 len)
> > +{
> > +	struct i2c_client *client = v4l2_get_subdevdata(&imx519->sd);
> > +	unsigned int i;
> > +	int ret;
> > +
> > +	for (i = 0; i < len; i++) {
> > +		ret = imx519_write_reg(imx519, regs[i].address, 1, regs[i].val);
> > +		if (ret) {
> > +			dev_err_ratelimited(&client->dev,
> > +					    "Failed to write reg 0x%4.4x. error = %d\n",
> > +					    regs[i].address, ret);
> > +
> > +			return ret;
> > +		}
> > +	}
> > +
> > +	return 0;
> > +}
> > +
> > +/* Get bayer order based on flip setting. */
> > +static u32 imx519_get_format_code(struct imx519 *imx519)
> > +{
> > +	unsigned int i;
> > +
> > +	lockdep_assert_held(&imx519->mutex);
> > +
> > +	i = (imx519->vflip->val ? 2 : 0) |
> > +	    (imx519->hflip->val ? 1 : 0);
> > +
> > +	return codes[i];
> > +}
> > +
> > +static int imx519_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
> > +{
> > +	struct imx519 *imx519 = to_imx519(sd);
> > +	struct v4l2_mbus_framefmt *try_fmt_img =
> > +		v4l2_subdev_get_try_format(sd, fh->state, IMAGE_PAD);
> > +	struct v4l2_mbus_framefmt *try_fmt_meta =
> > +		v4l2_subdev_get_try_format(sd, fh->state, METADATA_PAD);
> > +	struct v4l2_rect *try_crop;
> > +
> > +	mutex_lock(&imx519->mutex);
> > +
> > +	/* Initialize try_fmt for the image pad */
> > +	try_fmt_img->width = supported_modes_10bit[0].width;
> > +	try_fmt_img->height = supported_modes_10bit[0].height;
> > +	try_fmt_img->code = imx519_get_format_code(imx519);
> > +	try_fmt_img->field = V4L2_FIELD_NONE;
> > +
> > +	/* Initialize try_fmt for the embedded metadata pad */
> > +	try_fmt_meta->width = IMX519_EMBEDDED_LINE_WIDTH;
> > +	try_fmt_meta->height = IMX519_NUM_EMBEDDED_LINES;
> > +	try_fmt_meta->code = MEDIA_BUS_FMT_SENSOR_DATA;
> > +	try_fmt_meta->field = V4L2_FIELD_NONE;
> > +
> > +	/* Initialize try_crop */
> > +	try_crop = v4l2_subdev_get_try_crop(sd, fh->state, IMAGE_PAD);
> > +	try_crop->left = IMX519_PIXEL_ARRAY_LEFT;
> > +	try_crop->top = IMX519_PIXEL_ARRAY_TOP;
> > +	try_crop->width = IMX519_PIXEL_ARRAY_WIDTH;
> > +	try_crop->height = IMX519_PIXEL_ARRAY_HEIGHT;
> > +
> > +	mutex_unlock(&imx519->mutex);
> 
> It'd be nicer to do this in the init_cfg callback.
> 
> In general, also switching to subdev state API would be nice. An example,

Agreed. All new sensor drivers should use the subdev active state API.

> possibly somewhat unpolished, can be found here:
> <URL:https://git.kernel.org/pub/scm/linux/kernel/git/tomba/linux.git/commit/?h=streams/work&id=d865071782564f1f118d7ad5d4b6813f47d908b5>.

The imx219 driver, with the patches I've recently posted, should be a
good example.

> > +
> > +	return 0;
> > +}
> > +
> > +static void imx519_adjust_exposure_range(struct imx519 *imx519)
> > +{
> > +	int exposure_max, exposure_def;
> > +
> > +	/* Honour the VBLANK limits when setting exposure. */
> > +	exposure_max = imx519->mode->height + imx519->vblank->val -
> > +		       IMX519_EXPOSURE_OFFSET;
> > +	exposure_def = min(exposure_max, imx519->exposure->val);
> > +	__v4l2_ctrl_modify_range(imx519->exposure, imx519->exposure->minimum,
> > +				 exposure_max, imx519->exposure->step,
> > +				 exposure_def);
> > +}
> > +
> > +static int imx519_set_frame_length(struct imx519 *imx519, unsigned int val)
> > +{
> > +	int ret = 0;
> > +
> > +	imx519->long_exp_shift = 0;
> > +
> > +	while (val > IMX519_FRAME_LENGTH_MAX) {
> > +		imx519->long_exp_shift++;
> > +		val >>= 1;
> > +	}
> > +
> > +	ret = imx519_write_reg(imx519, IMX519_REG_FRAME_LENGTH,
> > +			       IMX519_REG_VALUE_16BIT, val);
> > +	if (ret)
> > +		return ret;
> > +
> > +	return imx519_write_reg(imx519, IMX519_LONG_EXP_SHIFT_REG,
> > +				IMX519_REG_VALUE_08BIT, imx519->long_exp_shift);
> > +}
> > +
> > +static int imx519_set_ctrl(struct v4l2_ctrl *ctrl)
> > +{
> > +	struct imx519 *imx519 =
> > +		container_of(ctrl->handler, struct imx519, ctrl_handler);
> > +	struct i2c_client *client = v4l2_get_subdevdata(&imx519->sd);
> > +	int ret = 0;
> > +
> > +	/*
> > +	 * The VBLANK control may change the limits of usable exposure, so check
> > +	 * and adjust if necessary.
> > +	 */
> > +	if (ctrl->id == V4L2_CID_VBLANK)
> > +		imx519_adjust_exposure_range(imx519);
> > +
> > +	/*
> > +	 * Applying V4L2 control value only happens
> > +	 * when power is up for streaming
> > +	 */
> > +	if (pm_runtime_get_if_in_use(&client->dev) == 0)
> > +		return 0;
> > +
> > +	switch (ctrl->id) {
> > +	case V4L2_CID_ANALOGUE_GAIN:
> > +		ret = imx519_write_reg(imx519, IMX519_REG_ANALOG_GAIN,
> > +				       IMX519_REG_VALUE_16BIT, ctrl->val);
> > +		break;
> > +	case V4L2_CID_EXPOSURE:
> > +		ret = imx519_write_reg(imx519, IMX519_REG_EXPOSURE,
> > +				       IMX519_REG_VALUE_16BIT, ctrl->val >>
> > +							imx519->long_exp_shift);
> > +		break;
> > +	case V4L2_CID_DIGITAL_GAIN:
> > +		ret = imx519_write_reg(imx519, IMX519_REG_DIGITAL_GAIN,
> > +				       IMX519_REG_VALUE_16BIT, ctrl->val);
> > +		break;
> > +	case V4L2_CID_TEST_PATTERN:
> > +		ret = imx519_write_reg(imx519, IMX519_REG_TEST_PATTERN,
> > +				       IMX519_REG_VALUE_16BIT,
> > +				       imx519_test_pattern_val[ctrl->val]);
> > +		break;
> > +	case V4L2_CID_TEST_PATTERN_RED:
> > +		ret = imx519_write_reg(imx519, IMX519_REG_TEST_PATTERN_R,
> > +				       IMX519_REG_VALUE_16BIT, ctrl->val);
> > +		break;
> > +	case V4L2_CID_TEST_PATTERN_GREENR:
> > +		ret = imx519_write_reg(imx519, IMX519_REG_TEST_PATTERN_GR,
> > +				       IMX519_REG_VALUE_16BIT, ctrl->val);
> > +		break;
> > +	case V4L2_CID_TEST_PATTERN_BLUE:
> > +		ret = imx519_write_reg(imx519, IMX519_REG_TEST_PATTERN_B,
> > +				       IMX519_REG_VALUE_16BIT, ctrl->val);
> > +		break;
> > +	case V4L2_CID_TEST_PATTERN_GREENB:
> > +		ret = imx519_write_reg(imx519, IMX519_REG_TEST_PATTERN_GB,
> > +				       IMX519_REG_VALUE_16BIT, ctrl->val);
> > +		break;
> > +	case V4L2_CID_HFLIP:
> > +	case V4L2_CID_VFLIP:
> > +		ret = imx519_write_reg(imx519, IMX519_REG_ORIENTATION, 1,
> > +				       imx519->hflip->val |
> > +				       imx519->vflip->val << 1);
> > +		break;
> > +	case V4L2_CID_VBLANK:
> > +		ret = imx519_set_frame_length(imx519,
> > +					      imx519->mode->height + ctrl->val);
> > +		break;
> > +	default:
> > +		dev_info(&client->dev,
> > +			 "ctrl(id:0x%x,val:0x%x) is not handled\n",
> > +			 ctrl->id, ctrl->val);
> > +		ret = -EINVAL;
> > +		break;
> > +	}
> > +
> > +	pm_runtime_put(&client->dev);
> > +
> > +	return ret;
> > +}
> > +
> > +static const struct v4l2_ctrl_ops imx519_ctrl_ops = {
> > +	.s_ctrl = imx519_set_ctrl,
> > +};
> > +
> > +static int imx519_enum_mbus_code(struct v4l2_subdev *sd,
> > +				 struct v4l2_subdev_state *sd_state,
> > +				 struct v4l2_subdev_mbus_code_enum *code)
> > +{
> > +	struct imx519 *imx519 = to_imx519(sd);
> > +
> > +	if (code->pad >= NUM_PADS)
> > +		return -EINVAL;
> 
> The caller will have checked for this already, same for other callbacks.
> 
> > +
> > +	if (code->pad == IMAGE_PAD) {
> > +		if (code->index > 0)
> > +			return -EINVAL;
> > +
> > +		code->code = imx519_get_format_code(imx519);
> > +	} else {
> > +		if (code->index > 0)
> > +			return -EINVAL;
> > +
> > +		code->code = MEDIA_BUS_FMT_SENSOR_DATA;
> > +	}
> > +
> > +	return 0;
> > +}
> > +
> > +static int imx519_enum_frame_size(struct v4l2_subdev *sd,
> > +				  struct v4l2_subdev_state *sd_state,
> > +				  struct v4l2_subdev_frame_size_enum *fse)
> > +{
> > +	struct imx519 *imx519 = to_imx519(sd);
> > +
> > +	if (fse->pad >= NUM_PADS)
> > +		return -EINVAL;
> > +
> > +	if (fse->pad == IMAGE_PAD) {
> > +		if (fse->index >= ARRAY_SIZE(supported_modes_10bit))
> > +			return -EINVAL;
> > +
> > +		if (fse->code != imx519_get_format_code(imx519))
> > +			return -EINVAL;
> > +
> > +		fse->min_width = supported_modes_10bit[fse->index].width;
> > +		fse->max_width = fse->min_width;
> > +		fse->min_height = supported_modes_10bit[fse->index].height;
> > +		fse->max_height = fse->min_height;
> > +	} else {
> > +		if (fse->code != MEDIA_BUS_FMT_SENSOR_DATA || fse->index > 0)
> > +			return -EINVAL;
> > +
> > +		fse->min_width = IMX519_EMBEDDED_LINE_WIDTH;
> > +		fse->max_width = fse->min_width;
> > +		fse->min_height = IMX519_NUM_EMBEDDED_LINES;
> > +		fse->max_height = fse->min_height;
> > +	}
> > +
> > +	return 0;
> > +}
> > +
> > +static void imx519_reset_colorspace(struct v4l2_mbus_framefmt *fmt)
> > +{
> > +	fmt->colorspace = V4L2_COLORSPACE_RAW;
> > +	fmt->ycbcr_enc = V4L2_MAP_YCBCR_ENC_DEFAULT(fmt->colorspace);
> > +	fmt->quantization = V4L2_MAP_QUANTIZATION_DEFAULT(true,
> > +							  fmt->colorspace,
> > +							  fmt->ycbcr_enc);
> > +	fmt->xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(fmt->colorspace);
> > +}
> > +
> > +static void imx519_update_image_pad_format(struct imx519 *imx519,
> > +					   const struct imx519_mode *mode,
> > +					   struct v4l2_subdev_format *fmt)
> > +{
> > +	fmt->format.width = mode->width;
> > +	fmt->format.height = mode->height;
> > +	fmt->format.field = V4L2_FIELD_NONE;
> > +	imx519_reset_colorspace(&fmt->format);
> > +}
> > +
> > +static void imx519_update_metadata_pad_format(struct v4l2_subdev_format *fmt)
> > +{
> > +	fmt->format.width = IMX519_EMBEDDED_LINE_WIDTH;
> > +	fmt->format.height = IMX519_NUM_EMBEDDED_LINES;
> > +	fmt->format.code = MEDIA_BUS_FMT_SENSOR_DATA;
> > +	fmt->format.field = V4L2_FIELD_NONE;
> > +}
> > +
> > +static int imx519_get_pad_format(struct v4l2_subdev *sd,
> > +				 struct v4l2_subdev_state *sd_state,
> > +				 struct v4l2_subdev_format *fmt)
> > +{
> > +	struct imx519 *imx519 = to_imx519(sd);
> > +
> > +	if (fmt->pad >= NUM_PADS)
> > +		return -EINVAL;
> > +
> > +	mutex_lock(&imx519->mutex);
> > +
> > +	if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
> > +		struct v4l2_mbus_framefmt *try_fmt =
> > +			v4l2_subdev_get_try_format(&imx519->sd, sd_state,
> > +						   fmt->pad);
> > +		/* update the code which could change due to vflip or hflip: */
> > +		try_fmt->code = fmt->pad == IMAGE_PAD ?
> > +				imx519_get_format_code(imx519) :
> > +				MEDIA_BUS_FMT_SENSOR_DATA;
> > +		fmt->format = *try_fmt;
> > +	} else {
> > +		if (fmt->pad == IMAGE_PAD) {
> > +			imx519_update_image_pad_format(imx519, imx519->mode,
> > +						       fmt);
> > +			fmt->format.code =
> > +			       imx519_get_format_code(imx519);
> > +		} else {
> > +			imx519_update_metadata_pad_format(fmt);
> > +		}
> > +	}
> > +
> > +	mutex_unlock(&imx519->mutex);
> > +	return 0;
> > +}
> > +
> > +static
> > +unsigned int imx519_get_frame_length(const struct imx519_mode *mode,
> > +				     const struct v4l2_fract *timeperframe)
> > +{
> > +	u64 frame_length;
> > +
> > +	frame_length = (u64)timeperframe->numerator * IMX519_PIXEL_RATE;
> > +	do_div(frame_length,
> > +	       (u64)timeperframe->denominator * mode->line_length_pix);
> > +
> > +	if (WARN_ON(frame_length > IMX519_FRAME_LENGTH_MAX))
> > +		frame_length = IMX519_FRAME_LENGTH_MAX;
> > +
> > +	return max_t(unsigned int, frame_length, mode->height);
> > +}
> > +
> > +static void imx519_set_framing_limits(struct imx519 *imx519)
> > +{
> > +	unsigned int frm_length_min, frm_length_default, hblank;
> > +	const struct imx519_mode *mode = imx519->mode;
> > +
> > +	frm_length_min = imx519_get_frame_length(mode, &mode->timeperframe_min);
> > +	frm_length_default =
> > +		     imx519_get_frame_length(mode, &mode->timeperframe_default);
> > +
> > +	/* Default to no long exposure multiplier. */
> > +	imx519->long_exp_shift = 0;
> > +
> > +	/* Update limits and set FPS to default */
> > +	__v4l2_ctrl_modify_range(imx519->vblank, frm_length_min - mode->height,
> > +				 ((1 << IMX519_LONG_EXP_SHIFT_MAX) *
> > +					IMX519_FRAME_LENGTH_MAX) - mode->height,
> > +				 1, frm_length_default - mode->height);
> > +
> > +	/* Setting this will adjust the exposure limits as well. */
> > +	__v4l2_ctrl_s_ctrl(imx519->vblank, frm_length_default - mode->height);
> > +
> > +	/*
> > +	 * Currently PPL is fixed to the mode specified value, so hblank
> > +	 * depends on mode->width only, and is not changeable in any
> > +	 * way other than changing the mode.
> > +	 */
> > +	hblank = mode->line_length_pix - mode->width;
> > +	__v4l2_ctrl_modify_range(imx519->hblank, hblank, hblank, 1, hblank);
> > +}
> > +
> > +static int imx519_set_pad_format(struct v4l2_subdev *sd,
> > +				 struct v4l2_subdev_state *sd_state,
> > +				 struct v4l2_subdev_format *fmt)
> > +{
> > +	struct v4l2_mbus_framefmt *framefmt;
> > +	const struct imx519_mode *mode;
> > +	struct imx519 *imx519 = to_imx519(sd);
> > +
> > +	if (fmt->pad >= NUM_PADS)
> > +		return -EINVAL;
> > +
> > +	mutex_lock(&imx519->mutex);
> > +
> > +	if (fmt->pad == IMAGE_PAD) {
> > +		/* Bayer order varies with flips */
> > +		fmt->format.code = imx519_get_format_code(imx519);
> > +
> > +		mode = v4l2_find_nearest_size(supported_modes_10bit,
> > +					      ARRAY_SIZE(supported_modes_10bit),
> > +					      width, height,
> > +					      fmt->format.width,
> > +					      fmt->format.height);
> > +		imx519_update_image_pad_format(imx519, mode, fmt);
> > +		if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
> > +			framefmt = v4l2_subdev_get_try_format(sd, sd_state,
> > +							      fmt->pad);
> > +			*framefmt = fmt->format;
> > +		} else {
> > +			imx519->mode = mode;
> > +			imx519->fmt_code = fmt->format.code;
> > +			imx519_set_framing_limits(imx519);
> > +		}
> > +	} else {
> > +		if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
> > +			framefmt = v4l2_subdev_get_try_format(sd, sd_state,
> > +							      fmt->pad);
> > +			*framefmt = fmt->format;
> > +		} else {
> > +			/* Only one embedded data mode is supported */
> > +			imx519_update_metadata_pad_format(fmt);
> > +		}
> > +	}
> > +
> > +	mutex_unlock(&imx519->mutex);
> > +
> > +	return 0;
> > +}
> > +
> > +static const struct v4l2_rect *
> > +__imx519_get_pad_crop(struct imx519 *imx519, struct v4l2_subdev_state *sd_state,
> > +		      unsigned int pad, enum v4l2_subdev_format_whence which)
> > +{
> > +	switch (which) {
> > +	case V4L2_SUBDEV_FORMAT_TRY:
> > +		return v4l2_subdev_get_try_crop(&imx519->sd, sd_state, pad);
> > +	case V4L2_SUBDEV_FORMAT_ACTIVE:
> > +		return &imx519->mode->crop;
> > +	}
> > +
> > +	return NULL;
> > +}
> > +
> > +static int imx519_get_selection(struct v4l2_subdev *sd,
> > +				struct v4l2_subdev_state *sd_state,
> > +				struct v4l2_subdev_selection *sel)
> > +{
> > +	switch (sel->target) {
> > +	case V4L2_SEL_TGT_CROP: {
> > +		struct imx519 *imx519 = to_imx519(sd);
> > +
> > +		mutex_lock(&imx519->mutex);
> > +		sel->r = *__imx519_get_pad_crop(imx519, sd_state, sel->pad,
> > +						sel->which);
> > +		mutex_unlock(&imx519->mutex);
> > +
> > +		return 0;
> > +	}
> > +
> > +	case V4L2_SEL_TGT_NATIVE_SIZE:
> > +		sel->r.left = 0;
> > +		sel->r.top = 0;
> > +		sel->r.width = IMX519_NATIVE_WIDTH;
> > +		sel->r.height = IMX519_NATIVE_HEIGHT;
> > +
> > +		return 0;
> > +
> > +	case V4L2_SEL_TGT_CROP_DEFAULT:
> > +	case V4L2_SEL_TGT_CROP_BOUNDS:
> > +		sel->r.left = IMX519_PIXEL_ARRAY_LEFT;
> > +		sel->r.top = IMX519_PIXEL_ARRAY_TOP;
> > +		sel->r.width = IMX519_PIXEL_ARRAY_WIDTH;
> > +		sel->r.height = IMX519_PIXEL_ARRAY_HEIGHT;
> > +
> > +		return 0;
> > +	}
> > +
> > +	return -EINVAL;
> > +}
> > +
> > +/* Start streaming */
> > +static int imx519_start_streaming(struct imx519 *imx519)
> > +{
> > +	struct i2c_client *client = v4l2_get_subdevdata(&imx519->sd);
> > +	const struct imx519_reg_list *reg_list;
> > +	int ret;
> > +
> > +	if (!imx519->common_regs_written) {
> > +		ret = imx519_write_regs(imx519, mode_common_regs,
> > +					ARRAY_SIZE(mode_common_regs));
> > +
> > +		if (ret) {
> > +			dev_err(&client->dev, "%s failed to set common settings\n",
> > +				__func__);
> > +			return ret;
> > +		}
> > +		imx519->common_regs_written = true;
> > +	}
> > +
> > +	/* Apply default values of current mode */
> > +	reg_list = &imx519->mode->reg_list;
> > +	ret = imx519_write_regs(imx519, reg_list->regs, reg_list->num_of_regs);
> > +	if (ret) {
> > +		dev_err(&client->dev, "%s failed to set mode\n", __func__);
> > +		return ret;
> > +	}
> > +
> > +	/* Apply customized values from user */
> > +	ret =  __v4l2_ctrl_handler_setup(imx519->sd.ctrl_handler);
> > +	if (ret)
> > +		return ret;
> > +
> > +	/* set stream on register */
> > +	return imx519_write_reg(imx519, IMX519_REG_MODE_SELECT,
> > +				IMX519_REG_VALUE_08BIT, IMX519_MODE_STREAMING);
> > +}
> > +
> > +/* Stop streaming */
> > +static void imx519_stop_streaming(struct imx519 *imx519)
> > +{
> > +	struct i2c_client *client = v4l2_get_subdevdata(&imx519->sd);
> > +	int ret;
> > +
> > +	/* set stream off register */
> > +	ret = imx519_write_reg(imx519, IMX519_REG_MODE_SELECT,
> > +			       IMX519_REG_VALUE_08BIT, IMX519_MODE_STANDBY);
> > +	if (ret)
> > +		dev_err(&client->dev, "%s failed to set stream\n", __func__);
> > +
> > +	__v4l2_ctrl_grab(imx519->vflip, false);
> > +	__v4l2_ctrl_grab(imx519->hflip, false);
> > +}
> > +
> > +static int imx519_set_stream(struct v4l2_subdev *sd, int enable)
> > +{
> > +	struct imx519 *imx519 = to_imx519(sd);
> > +	struct i2c_client *client = v4l2_get_subdevdata(sd);
> > +	int ret = 0;
> > +
> > +	mutex_lock(&imx519->mutex);
> > +	if (imx519->streaming == enable) {
> > +		mutex_unlock(&imx519->mutex);
> > +		return 0;
> > +	}
> > +
> > +	if (enable) {
> > +		ret = pm_runtime_get_sync(&client->dev);
> > +		if (ret < 0) {
> > +			pm_runtime_put_noidle(&client->dev);
> > +			goto err_unlock;
> > +		}
> > +
> > +		/*
> > +		 * Apply default & customized values
> > +		 * and then start streaming.
> > +		 */
> > +		ret = imx519_start_streaming(imx519);
> > +		if (ret)
> > +			goto err_rpm_put;
> > +	} else {
> > +		imx519_stop_streaming(imx519);
> > +		pm_runtime_put(&client->dev);
> > +	}
> > +
> > +	imx519->streaming = enable;
> > +
> > +	/* vflip and hflip cannot change during streaming */
> > +	__v4l2_ctrl_grab(imx519->vflip, enable);
> > +	__v4l2_ctrl_grab(imx519->hflip, enable);
> > +
> > +	mutex_unlock(&imx519->mutex);
> > +
> > +	return ret;
> > +
> > +err_rpm_put:
> > +	pm_runtime_put(&client->dev);
> > +err_unlock:
> > +	mutex_unlock(&imx519->mutex);
> > +
> > +	return ret;
> > +}
> > +
> > +/* Power/clock management functions */
> > +static int imx519_power_on(struct device *dev)
> > +{
> > +	struct i2c_client *client = to_i2c_client(dev);
> > +	struct v4l2_subdev *sd = i2c_get_clientdata(client);
> > +	struct imx519 *imx519 = to_imx519(sd);
> > +	int ret;
> > +
> > +	ret = regulator_bulk_enable(IMX519_NUM_SUPPLIES,
> > +				    imx519->supplies);
> > +	if (ret) {
> > +		dev_err(&client->dev, "%s: failed to enable regulators\n",
> > +			__func__);
> > +		return ret;
> > +	}
> > +
> > +	ret = clk_prepare_enable(imx519->xclk);
> > +	if (ret) {
> > +		dev_err(&client->dev, "%s: failed to enable clock\n",
> > +			__func__);
> > +		goto reg_off;
> > +	}
> > +
> > +	gpiod_set_value_cansleep(imx519->reset_gpio, 1);
> > +	usleep_range(IMX519_XCLR_MIN_DELAY_US,
> > +		     IMX519_XCLR_MIN_DELAY_US + IMX519_XCLR_DELAY_RANGE_US);
> > +
> > +	return 0;
> > +
> > +reg_off:
> > +	regulator_bulk_disable(IMX519_NUM_SUPPLIES, imx519->supplies);
> > +
> > +	return ret;
> > +}
> > +
> > +static int imx519_power_off(struct device *dev)
> > +{
> > +	struct i2c_client *client = to_i2c_client(dev);
> > +	struct v4l2_subdev *sd = i2c_get_clientdata(client);
> > +	struct imx519 *imx519 = to_imx519(sd);
> > +
> > +	gpiod_set_value_cansleep(imx519->reset_gpio, 0);
> > +	regulator_bulk_disable(IMX519_NUM_SUPPLIES, imx519->supplies);
> > +	clk_disable_unprepare(imx519->xclk);
> > +
> > +	/* Force reprogramming of the common registers when powered up again. */
> > +	imx519->common_regs_written = false;
> > +
> > +	return 0;
> > +}
> > +
> > +static int __maybe_unused imx519_suspend(struct device *dev)
> > +{
> > +	struct i2c_client *client = to_i2c_client(dev);
> > +	struct v4l2_subdev *sd = i2c_get_clientdata(client);
> > +	struct imx519 *imx519 = to_imx519(sd);
> > +
> > +	if (imx519->streaming)
> > +		imx519_stop_streaming(imx519);
> > +
> > +	return 0;
> > +}
> > +
> > +static int __maybe_unused imx519_resume(struct device *dev)
> > +{
> > +	struct i2c_client *client = to_i2c_client(dev);
> > +	struct v4l2_subdev *sd = i2c_get_clientdata(client);
> > +	struct imx519 *imx519 = to_imx519(sd);
> > +	int ret;
> > +
> > +	if (imx519->streaming) {
> > +		ret = imx519_start_streaming(imx519);
> > +		if (ret)
> > +			goto error;
> > +	}
> > +
> > +	return 0;
> > +
> > +error:
> > +	imx519_stop_streaming(imx519);
> > +	imx519->streaming = 0;
> > +	return ret;
> > +}

No need for system suspend/resume handlers. You can drop the streaming
field too.

> > +
> > +static int imx519_get_regulators(struct imx519 *imx519)
> > +{
> > +	struct i2c_client *client = v4l2_get_subdevdata(&imx519->sd);
> > +	unsigned int i;
> > +
> > +	for (i = 0; i < IMX519_NUM_SUPPLIES; i++)
> > +		imx519->supplies[i].supply = imx519_supply_name[i];
> > +
> > +	return devm_regulator_bulk_get(&client->dev,
> > +				       IMX519_NUM_SUPPLIES,
> > +				       imx519->supplies);
> > +}
> > +
> > +/* Verify chip ID */
> > +static int imx519_identify_module(struct imx519 *imx519, u32 expected_id)
> > +{
> > +	struct i2c_client *client = v4l2_get_subdevdata(&imx519->sd);
> > +	int ret;
> > +	u32 val;
> > +
> > +	ret = imx519_read_reg(imx519, IMX519_REG_CHIP_ID,
> > +			      IMX519_REG_VALUE_16BIT, &val);
> > +	if (ret) {
> > +		dev_err(&client->dev, "failed to read chip id %x, with error %d\n",
> > +			expected_id, ret);
> > +		return ret;
> > +	}
> > +
> > +	if (val != expected_id) {
> > +		dev_err(&client->dev, "chip id mismatch: %x!=%x\n",
> > +			expected_id, val);
> > +		return -EIO;
> > +	}
> > +
> > +	dev_info(&client->dev, "Device found is imx%x\n", val);
> > +
> > +	return 0;
> > +}

Move these two functions after the subdev ops.

> > +
> > +static const struct v4l2_subdev_core_ops imx519_core_ops = {
> > +	.subscribe_event = v4l2_ctrl_subdev_subscribe_event,
> > +	.unsubscribe_event = v4l2_event_subdev_unsubscribe,
> > +};
> > +
> > +static const struct v4l2_subdev_video_ops imx519_video_ops = {
> > +	.s_stream = imx519_set_stream,
> > +};
> > +
> > +static const struct v4l2_subdev_pad_ops imx519_pad_ops = {
> > +	.enum_mbus_code = imx519_enum_mbus_code,
> > +	.get_fmt = imx519_get_pad_format,
> > +	.set_fmt = imx519_set_pad_format,
> > +	.get_selection = imx519_get_selection,
> > +	.enum_frame_size = imx519_enum_frame_size,
> > +};
> > +
> > +static const struct v4l2_subdev_ops imx519_subdev_ops = {
> > +	.core = &imx519_core_ops,
> > +	.video = &imx519_video_ops,
> > +	.pad = &imx519_pad_ops,
> > +};
> > +
> > +static const struct v4l2_subdev_internal_ops imx519_internal_ops = {
> > +	.open = imx519_open,
> > +};
> > +
> > +/* Initialize control handlers */
> > +static int imx519_init_controls(struct imx519 *imx519)
> > +{
> > +	struct v4l2_ctrl_handler *ctrl_hdlr;
> > +	struct i2c_client *client = v4l2_get_subdevdata(&imx519->sd);
> > +	struct v4l2_fwnode_device_properties props;
> > +	unsigned int i;
> > +	int ret;
> > +
> > +	ctrl_hdlr = &imx519->ctrl_handler;
> > +	ret = v4l2_ctrl_handler_init(ctrl_hdlr, 16);
> > +	if (ret)
> > +		return ret;
> > +
> > +	mutex_init(&imx519->mutex);
> > +	ctrl_hdlr->lock = &imx519->mutex;
> > +
> > +	/* By default, PIXEL_RATE is read only */
> > +	imx519->pixel_rate = v4l2_ctrl_new_std(ctrl_hdlr, &imx519_ctrl_ops,
> > +					       V4L2_CID_PIXEL_RATE,
> > +					       IMX519_PIXEL_RATE,
> > +					       IMX519_PIXEL_RATE, 1,
> > +					       IMX519_PIXEL_RATE);
> > +
> > +	/*
> > +	 * Create the controls here, but mode specific limits are setup
> > +	 * in the imx519_set_framing_limits() call below.
> > +	 */
> > +	imx519->vblank = v4l2_ctrl_new_std(ctrl_hdlr, &imx519_ctrl_ops,
> > +					   V4L2_CID_VBLANK, 0, 0xffff, 1, 0);
> > +	imx519->hblank = v4l2_ctrl_new_std(ctrl_hdlr, &imx519_ctrl_ops,
> > +					   V4L2_CID_HBLANK, 0, 0xffff, 1, 0);
> > +
> > +	/* HBLANK is read-only for now, but does change with mode. */
> > +	if (imx519->hblank)
> > +		imx519->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY;
> > +
> > +	imx519->exposure = v4l2_ctrl_new_std(ctrl_hdlr, &imx519_ctrl_ops,
> > +					     V4L2_CID_EXPOSURE,
> > +					     IMX519_EXPOSURE_MIN,
> > +					     IMX519_EXPOSURE_MAX,
> > +					     IMX519_EXPOSURE_STEP,
> > +					     IMX519_EXPOSURE_DEFAULT);
> > +
> > +	v4l2_ctrl_new_std(ctrl_hdlr, &imx519_ctrl_ops, V4L2_CID_ANALOGUE_GAIN,
> > +			  IMX519_ANA_GAIN_MIN, IMX519_ANA_GAIN_MAX,
> > +			  IMX519_ANA_GAIN_STEP, IMX519_ANA_GAIN_DEFAULT);
> > +
> > +	v4l2_ctrl_new_std(ctrl_hdlr, &imx519_ctrl_ops, V4L2_CID_DIGITAL_GAIN,
> > +			  IMX519_DGTL_GAIN_MIN, IMX519_DGTL_GAIN_MAX,
> > +			  IMX519_DGTL_GAIN_STEP, IMX519_DGTL_GAIN_DEFAULT);
> > +
> > +	imx519->hflip = v4l2_ctrl_new_std(ctrl_hdlr, &imx519_ctrl_ops,
> > +					  V4L2_CID_HFLIP, 0, 1, 1, 0);
> > +	if (imx519->hflip)
> > +		imx519->hflip->flags |= V4L2_CTRL_FLAG_MODIFY_LAYOUT;
> > +
> > +	imx519->vflip = v4l2_ctrl_new_std(ctrl_hdlr, &imx519_ctrl_ops,
> > +					  V4L2_CID_VFLIP, 0, 1, 1, 0);
> > +	if (imx519->vflip)
> > +		imx519->vflip->flags |= V4L2_CTRL_FLAG_MODIFY_LAYOUT;
> > +
> > +	v4l2_ctrl_new_std_menu_items(ctrl_hdlr, &imx519_ctrl_ops,
> > +				     V4L2_CID_TEST_PATTERN,
> > +				     ARRAY_SIZE(imx519_test_pattern_menu) - 1,
> > +				     0, 0, imx519_test_pattern_menu);
> > +	for (i = 0; i < 4; i++) {
> > +		/*
> > +		 * The assumption is that
> > +		 * V4L2_CID_TEST_PATTERN_GREENR == V4L2_CID_TEST_PATTERN_RED + 1
> > +		 * V4L2_CID_TEST_PATTERN_BLUE   == V4L2_CID_TEST_PATTERN_RED + 2
> > +		 * V4L2_CID_TEST_PATTERN_GREENB == V4L2_CID_TEST_PATTERN_RED + 3
> > +		 */
> > +		v4l2_ctrl_new_std(ctrl_hdlr, &imx519_ctrl_ops,
> > +				  V4L2_CID_TEST_PATTERN_RED + i,
> > +				  IMX519_TEST_PATTERN_COLOUR_MIN,
> > +				  IMX519_TEST_PATTERN_COLOUR_MAX,
> > +				  IMX519_TEST_PATTERN_COLOUR_STEP,
> > +				  IMX519_TEST_PATTERN_COLOUR_MAX);
> > +		/* The "Solid color" pattern is white by default */
> > +	}
> > +
> > +	if (ctrl_hdlr->error) {
> > +		ret = ctrl_hdlr->error;
> > +		dev_err(&client->dev, "%s control init failed (%d)\n",
> > +			__func__, ret);
> > +		goto error;
> > +	}
> > +
> > +	ret = v4l2_fwnode_device_parse(&client->dev, &props);
> > +	if (ret)
> > +		goto error;
> > +
> > +	ret = v4l2_ctrl_new_fwnode_properties(ctrl_hdlr, &imx519_ctrl_ops,
> > +					      &props);
> > +	if (ret)
> > +		goto error;
> > +
> > +	imx519->sd.ctrl_handler = ctrl_hdlr;
> > +
> > +	/* Setup exposure and frame/line length limits. */
> > +	imx519_set_framing_limits(imx519);
> > +
> > +	return 0;
> > +
> > +error:
> > +	v4l2_ctrl_handler_free(ctrl_hdlr);
> > +	mutex_destroy(&imx519->mutex);
> > +
> > +	return ret;
> > +}
> > +
> > +static void imx519_free_controls(struct imx519 *imx519)
> > +{
> > +	v4l2_ctrl_handler_free(imx519->sd.ctrl_handler);
> > +	mutex_destroy(&imx519->mutex);
> > +}
> > +
> > +static int imx519_check_hwcfg(struct device *dev)
> > +{
> > +	struct fwnode_handle *endpoint;
> > +	struct v4l2_fwnode_endpoint ep_cfg = {
> > +		.bus_type = V4L2_MBUS_CSI2_DPHY
> > +	};
> > +	int ret = -EINVAL;
> > +
> > +	endpoint = fwnode_graph_get_next_endpoint(dev_fwnode(dev), NULL);
> > +	if (!endpoint) {
> > +		dev_err(dev, "endpoint node not found\n");
> > +		return -EINVAL;
> > +	}
> > +
> > +	if (v4l2_fwnode_endpoint_alloc_parse(endpoint, &ep_cfg)) {
> > +		dev_err(dev, "could not parse endpoint\n");
> > +		goto error_out;
> > +	}
> > +
> > +	/* Check the number of MIPI CSI2 data lanes */
> > +	if (ep_cfg.bus.mipi_csi2.num_data_lanes != 2) {
> > +		dev_err(dev, "only 2 data lanes are currently supported\n");
> > +		goto error_out;
> > +	}
> > +
> > +	/* Check the link frequency set in device tree */
> > +	if (!ep_cfg.nr_of_link_frequencies) {
> > +		dev_err(dev, "link-frequency property not found in DT\n");
> > +		goto error_out;
> > +	}
> > +
> > +	if (ep_cfg.nr_of_link_frequencies != 1 ||
> > +	    ep_cfg.link_frequencies[0] != IMX519_DEFAULT_LINK_FREQ) {
> > +		dev_err(dev, "Link frequency not supported: %lld\n",
> > +			ep_cfg.link_frequencies[0]);
> > +		goto error_out;
> > +	}
> > +
> > +	ret = 0;
> > +
> > +error_out:
> > +	v4l2_fwnode_endpoint_free(&ep_cfg);
> > +	fwnode_handle_put(endpoint);
> > +
> > +	return ret;
> > +}
> > +
> > +static const struct of_device_id imx519_dt_ids[] = {
> > +	{ .compatible = "sony,imx519"},

Missing space.

> > +	{ /* sentinel */ }
> > +};
> > +
> > +static int imx519_probe(struct i2c_client *client)
> > +{
> > +	struct device *dev = &client->dev;
> > +	struct imx519 *imx519;
> > +	const struct of_device_id *match;
> > +	u32 xclk_freq;
> > +	int ret;
> > +
> > +	imx519 = devm_kzalloc(&client->dev, sizeof(*imx519), GFP_KERNEL);
> > +	if (!imx519)
> > +		return -ENOMEM;
> > +
> > +	v4l2_i2c_subdev_init(&imx519->sd, client, &imx519_subdev_ops);
> > +
> > +	match = of_match_device(imx519_dt_ids, dev);
> > +	if (!match)
> > +		return -ENODEV;
> 
> You only handle a single device, do you need this?
> 
> > +
> > +	/* Check the hardware configuration in device tree */
> > +	if (imx519_check_hwcfg(dev))
> > +		return -EINVAL;
> > +
> > +	/* Get system clock (xclk) */
> > +	imx519->xclk = devm_clk_get(dev, NULL);
> > +	if (IS_ERR(imx519->xclk)) {
> > +		dev_err(dev, "failed to get xclk\n");
> > +		return PTR_ERR(imx519->xclk);
> > +	}
> > +
> > +	xclk_freq = clk_get_rate(imx519->xclk);
> > +	if (xclk_freq != IMX519_XCLK_FREQ) {
> > +		dev_err(dev, "xclk frequency not supported: %d Hz\n",
> > +			xclk_freq);
> > +		return -EINVAL;
> > +	}
> > +
> > +	ret = imx519_get_regulators(imx519);
> > +	if (ret) {
> > +		dev_err(dev, "failed to get regulators\n");
> > +		return ret;
> > +	}
> > +
> > +	/* Request optional enable pin */
> > +	imx519->reset_gpio = devm_gpiod_get_optional(dev, "reset",
> > +						     GPIOD_OUT_HIGH);
> > +
> > +	/*
> > +	 * The sensor must be powered for imx519_identify_module()
> > +	 * to be able to read the CHIP_ID register
> > +	 */
> > +	ret = imx519_power_on(dev);
> > +	if (ret)
> > +		return ret;
> > +
> > +	ret = imx519_identify_module(imx519, IMX519_CHIP_ID);
> > +	if (ret)
> > +		goto error_power_off;
> > +
> > +	/* Set default mode to max resolution */
> > +	imx519->mode = &supported_modes_10bit[0];
> > +	imx519->fmt_code = MEDIA_BUS_FMT_SRGGB10_1X10;
> > +
> > +	/* Enable runtime PM and turn off the device */
> > +	pm_runtime_set_active(dev);
> > +	pm_runtime_enable(dev);
> > +	pm_runtime_idle(dev);
> > +
> > +	/* This needs the pm runtime to be registered. */
> > +	ret = imx519_init_controls(imx519);
> > +	if (ret)
> > +		goto error_power_off;
> > +
> > +	/* Initialize subdev */
> > +	imx519->sd.internal_ops = &imx519_internal_ops;
> > +	imx519->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE |
> > +			    V4L2_SUBDEV_FL_HAS_EVENTS;
> > +	imx519->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
> > +
> > +	/* Initialize source pads */
> > +	imx519->pad[IMAGE_PAD].flags = MEDIA_PAD_FL_SOURCE;
> > +	imx519->pad[METADATA_PAD].flags = MEDIA_PAD_FL_SOURCE;
> > +
> > +	ret = media_entity_pads_init(&imx519->sd.entity, NUM_PADS, imx519->pad);
> > +	if (ret) {
> > +		dev_err(dev, "failed to init entity pads: %d\n", ret);
> > +		goto error_handler_free;
> > +	}
> > +
> > +	ret = v4l2_async_register_subdev_sensor(&imx519->sd);
> > +	if (ret < 0) {
> > +		dev_err(dev, "failed to register sensor sub-device: %d\n", ret);
> > +		goto error_media_entity;
> > +	}
> > +
> > +	return 0;
> > +
> > +error_media_entity:
> > +	media_entity_cleanup(&imx519->sd.entity);
> > +
> > +error_handler_free:
> > +	imx519_free_controls(imx519);
> > +
> > +error_power_off:
> > +	pm_runtime_disable(&client->dev);
> > +	pm_runtime_set_suspended(&client->dev);
> > +	imx519_power_off(&client->dev);
> > +
> > +	return ret;
> > +}
> > +
> > +static void imx519_remove(struct i2c_client *client)
> > +{
> > +	struct v4l2_subdev *sd = i2c_get_clientdata(client);
> > +	struct imx519 *imx519 = to_imx519(sd);
> > +
> > +	v4l2_async_unregister_subdev(sd);
> > +	media_entity_cleanup(&sd->entity);
> > +	imx519_free_controls(imx519);
> > +
> > +	pm_runtime_disable(&client->dev);
> > +	if (!pm_runtime_status_suspended(&client->dev))
> > +		imx519_power_off(&client->dev);
> > +	pm_runtime_set_suspended(&client->dev);
> > +}
> > +
> > +MODULE_DEVICE_TABLE(of, imx519_dt_ids);
> > +
> > +static const struct dev_pm_ops imx519_pm_ops = {
> > +	SET_SYSTEM_SLEEP_PM_OPS(imx519_suspend, imx519_resume)
> > +	SET_RUNTIME_PM_OPS(imx519_power_off, imx519_power_on, NULL)
> > +};
> > +
> > +static struct i2c_driver imx519_i2c_driver = {
> > +	.driver = {
> > +		.name = "imx519",
> > +		.of_match_table	= imx519_dt_ids,
> > +		.pm = &imx519_pm_ops,
> > +	},
> > +	.probe_new = imx519_probe,
> > +	.remove = imx519_remove,
> > +};
> > +
> > +module_i2c_driver(imx519_i2c_driver);
> > +
> > +MODULE_AUTHOR("Lee Jackson <lee.jackson@arducam.com>");
> > +MODULE_DESCRIPTION("Sony IMX519 sensor driver");
> > +MODULE_LICENSE("GPL v2");